Wellington K Hsu

  • 2912 Citations
20032023
If you made any changes in Pure, your changes will be visible here soon.

Research Output 2003 2019

2019
2 Citations (Scopus)

Anatomic Considerations in the Lateral Transpsoas Interbody Fusion: The Impact of Age, Sex, BMI, and Scoliosis

Mai, H. T., Schneider, A. D., Alvarez, A. P., Hashmi, S. Z., Smith, J. T., Freshman, R. D., Mitchell, S. M., Qin, C. D. & Hsu, W. K., Jun 1 2019, In : Clinical Spine Surgery. 32, 5, p. 215-221 7 p.

Research output: Contribution to journalArticle

Scoliosis
Anatomy
Blood Vessels
Lumbosacral Plexus
Anatomic Variation

Controversies in the management of cervical spine conditions in elite athletes

Pahapill, R. R. & Hsu, W. K., Jan 1 2019, In : Orthopedics. 42, 4, p. E370-E375

Research output: Contribution to journalReview article

Athletes
Spine
Diskectomy
Pseudarthrosis
Wounds and Injuries
3 Citations (Scopus)

Cost-effectiveness of a Bone-anchored Annular Closure Device Versus Conventional Lumbar Discectomy in Treating Lumbar Disc Herniations

Ament, J., Thaci, B., Yang, Z., Kulubya, E., Hsu, W. K., Bouma, G. & Kim, K. D., Jan 1 2019, In : Spine. 44, 1, p. 5-16 12 p.

Research output: Contribution to journalArticle

Diskectomy
Cost-Benefit Analysis
Bone and Bones
Equipment and Supplies
Costs and Cost Analysis
1 Citation (Scopus)

Intervertebral disc herniation in elite athletes

Yamaguchi, J. T. & Hsu, W. K., Apr 4 2019, In : International Orthopaedics. 43, 4, p. 833-840 8 p.

Research output: Contribution to journalReview article

Intervertebral Disc
Athletes
Population
Myelography
Neck Pain
2 Citations (Scopus)

Prognosis Following Hip Arthroscopy Varies in Professional Athletes Based on Sport

Christian, R. A., Lubbe, R. J., Chun, D. S., Selley, R. S., Terry, M. A. & Hsu, W. K., Mar 1 2019, In : Arthroscopy - Journal of Arthroscopic and Related Surgery. 35, 3, p. 837-842.e1

Research output: Contribution to journalArticle

Arthroscopy
Athletes
Sports
Hip
Hockey
2 Citations (Scopus)
Diskectomy
Deglutition Disorders
Statistical Factor Analysis
Eating
Postoperative Period
3 Citations (Scopus)
Opioid Analgesics
Prescriptions
Spine
Confidence Intervals
Tertiary Healthcare

Stem Cells and Spinal Fusion

Shah, V. P. & Hsu, W. K., Jan 1 2019, (Accepted/In press) In : Neurosurgery clinics of North America.

Research output: Contribution to journalReview article

Spinal Fusion
Cell Fusion
Stem Cells
Pseudarthrosis
Bone Regeneration

The negative impact of anterior cruciate ligament reconstruction in professional male footballers

Barth, K. A., Lawton, C. D., Touhey, D. C., Selley, R. S., Li, D. D., Balderama, E. S., Nuber, G. M. & Hsu, W. K., Jan 1 2019, In : Knee. 26, 1, p. 142-148 7 p.

Research output: Contribution to journalArticle

Anterior Cruciate Ligament Reconstruction
Athletes
Soccer
Sports
Return to Sport

The use of a novel tablet application to quantify dysfunction in cervical spondylotic myelopathy patients

Rosenthal, B. D., Jenkins, T. J., Ranade, A., Bhatt, S., Hsu, W. K. & Patel, A. A., Jan 1 2019, In : Spine Journal. 19, 1, p. 157-162 6 p.

Research output: Contribution to journalArticle

Motor Skills
Spinal Cord Diseases
Tablets
Upper Extremity
Orthopedics

The Variability of Lumbar Facet Joint Synovial Cyst Recurrence Requiring Revision Surgery after Decompression-only and Decompression/Fusion

Wun, K., Hashmi, S. Z., Maslak, J., Schneider, A. D., Katchko, K. M., Singh, G., Patel, A. A. & Hsu, W. K., Jan 1 2019, (Accepted/In press) In : Clinical Spine Surgery.

Research output: Contribution to journalArticle

Synovial Cyst
Zygapophyseal Joint
Decompression
Reoperation
Recurrence
1 Citation (Scopus)
Information Systems
Patient Reported Outcome Measures
Radiculopathy
2018
1 Citation (Scopus)

3D Printing Applications in Minimally Invasive Spine Surgery

Hsu, M. R., Haleem, M. S. & Hsu, W. K., Jan 1 2018, In : Minimally Invasive Surgery. 2018, 4760769.

Research output: Contribution to journalReview article

Minimally Invasive Surgical Procedures
Spine
Technology
Three Dimensional Printing
Patient Care

A cross-sport comparison of performance-based outcomes of professional athletes following primary microfracture of the knee

Schallmo, M. S., Singh, S. K., Barth, K. A., Freshman, R. D., Mai, H. T. & Hsu, W. K., Aug 1 2018, In : Knee. 25, 4, p. 692-698 7 p.

Research output: Contribution to journalArticle

Athletic Performance
Stress Fractures
Athletes
Knee
Baseball
2 Citations (Scopus)

Aryl hydrocarbon receptor antagonists mitigate the effects of dioxin on critical cellular functions in differentiating human osteoblast-like cells

Yun, C., Katchko, K. M., Schallmo, M. S., Jeong, S., Yun, J., Chen, C. H., Weiner, J. A., Park, C., George, A., Stupp, S., Hsu, W. K. & Hsu, E. L., Jan 11 2018, In : International journal of molecular sciences. 19, 1, 225.

Research output: Contribution to journalArticle

Aryl Hydrocarbon Receptors
osteoblasts
Dioxins
Osteoblasts
hydrocarbons

Biologics of Lumbar Interbody Fusion

Singh, G. & Hsu, W. K., Dec 1 2018, In : Seminars in Spine Surgery. 30, 4, p. 194-202 9 p.

Research output: Contribution to journalArticle

Biological Products
Spine
Transplants
Bone Substitutes
Bone Matrix
10 Citations (Scopus)

Bony ingrowth potential of 3D-printed porous titanium alloy: a direct comparison of interbody cage materials in an in vivo ovine lumbar fusion model

McGilvray, K. C., Easley, J., Seim, H. B., Regan, D., Berven, S. H., Hsu, W. K., Mroz, T. E. & Puttlitz, C. M., Jul 1 2018, In : Spine Journal. 18, 7, p. 1250-1260 11 p.

Research output: Contribution to journalArticle

Titanium
Sheep
Articular Range of Motion
Bone and Bones
Spinal Fusion
2 Citations (Scopus)

High-resolution magnetization transfer MRI in patients with cervical spondylotic myelopathy

Suleiman, L. I., Weber, K. A., Rosenthal, B. D., Bhatt, S. A., Savage, J. W., Hsu, W. K., Patel, A. A. & Parrish, T. B., May 1 2018, In : Journal of Clinical Neuroscience. 51, p. 57-61 5 p.

Research output: Contribution to journalArticle

Spinal Cord Diseases
Magnetic Resonance Imaging
Intervertebral Disc
Myelin Sheath
Demyelinating Diseases
6 Citations (Scopus)

National football league head, neck and spine committee’s concussion diagnosis and management protocol: 2017-18 season

Ellenbogen, R. G., Batjer, H., Cardenas, J., Berger, M., Bailes, J., Pieroth, E., Heyer, R., Theodore, N., Hsu, W. K., Nabel, E., Maroon, J., Cantu, R., Barnes, R., Collins, J., Putukian, M., Lonser, R., Solomon, G. & Sills, A., Jul 1 2018, In : British Journal of Sports Medicine. 52, 14, p. 894-902 9 p.

Research output: Contribution to journalReview article

Open Access
Football
Spine
Neck
Sports
Head

Performance-based outcomes following lisfranc injury among professional American football and rugby athletes

Singh, S. K., George, A., Kadakia, A. R. & Hsu, W. K., Jul 1 2018, In : Orthopedics. 41, 4, p. e479-e482

Research output: Contribution to journalArticle

Football
Athletes
Wounds and Injuries
Physicians
1 Citation (Scopus)

Post-lumbar discectomy reoperations that are associated with poor clinical and socioeconomic outcomes can be reduced through use of a novel annular closure device: results from a 2-year randomized controlled trial

Klassen, P. D., Hsu, W. K., Martens, F., Inzana, J. A., van den Brink, W. A., Groff, M. W. & Thomé, C., Jun 26 2018, In : ClinicoEconomics and Outcomes Research. 10, p. 349-357 9 p.

Research output: Contribution to journalArticle

Diskectomy
Reoperation
Randomized Controlled Trials
Equipment and Supplies
Costs and Cost Analysis
2 Citations (Scopus)
Fracture Fixation
Reoperation
Athletes
Sports
Foot
1 Citation (Scopus)

Spinal Biologics in Minimally Invasive Lumbar Surgery

Chang, K. Y. & Hsu, W. K., Jan 1 2018, In : Minimally Invasive Surgery. 2018, 5230350.

Research output: Contribution to journalReview article

Minimally Invasive Surgical Procedures
Biological Products
Spine
Bone Substitutes
Arthrodesis
4 Citations (Scopus)

The Difference in Clinical Outcomes after Anterior Cervical Fusion, Disk Replacement, and Foraminotomy in Professional Athletes

Mai, H. T., Chun, D. S., Schneider, A. D., Hecht, A. C., Maroon, J. C. & Hsu, W. K., Jan 1 2018, In : Clinical Spine Surgery. 31, 1, p. E80-E84

Research output: Contribution to journalArticle

Foraminotomy
Athletes
Diskectomy
Total Disc Replacement
Sports

The Effectiveness of Bioskills Training for Simulated Lumbar Pedicle Screw Placement

Boody, B. S., Hashmi, S. Z., Rosenthal, B. D., Maslak, J. P., McCarthy, M. H., Patel, A. A., Savage, J. W. & Hsu, W. K., Sep 1 2018, In : Global Spine Journal. 8, 6, p. 557-562 6 p.

Research output: Contribution to journalArticle

Control Groups
Spine
Physicians
Equipment and Supplies
Social Identification
2 Citations (Scopus)
Dysphonia
Diskectomy
Deglutition Disorders
Adrenal Cortex Hormones
Randomized Controlled Trials
1 Citation (Scopus)

Thoracolumbar burst fractures

Rosenthal, B. D., Boody, B. S., Jenkins, T. J., Hsu, W. K., Patel, A. A. & Savage, J. W., Jan 1 2018, In : Clinical Spine Surgery. 31, 4, p. 143-151 9 p.

Research output: Contribution to journalReview article

Operative Surgical Procedures
Wounds and Injuries
Clinical Decision-Making
10 Citations (Scopus)

Validation of patient reported outcomes measurement information System (PROMIS) computer adaptive tests (CATs) in the surgical treatment of lumbar spinal stenosis

Patel, A. A., Dodwad, S. N. M., Boody, B. S., Bhatt, S., Savage, J. W., Hsu, W. K. & Rothrock, N. E., Jan 1 2018, In : Spine. 43, 21, p. 1521-1528 8 p.

Research output: Contribution to journalArticle

Spinal Stenosis
Information Systems
Pain
Therapeutics
Patient Reported Outcome Measures
12 Citations (Scopus)

Validation of Patient-Reported Outcomes Measurement Information System (PROMIS) computerized adaptive tests in cervical spine surgery

Boody, B. S., Bhatt, S., Mazmudar, A. S., Hsu, W. K., Rothrock, N. E. & Patel, A. A., Mar 1 2018, In : Journal of Neurosurgery: Spine. 28, 3, p. 268-279 12 p.

Research output: Contribution to journalArticle

Information Systems
Spine
Neck
Pain
Radiculopathy
2017
1 Citation (Scopus)

A multicenter study of the presentation, treatment, and outcomes of cervical dural tears

O'Neill, K. R., Fehlings, M. G., Mroz, T. E., Smith, Z. A., Hsu, W. K., Kanter, A. S., Steinmetz, M. P., Arnold, P. M., Mummaneni, P. V., Chou, D., Nassr, A., Qureshi, S. A., Cho, S. K., Baird, E. O., Smith, J. S., Shaffrey, C., Tannoury, C. A., Tannoury, T., Gokaslan, Z. L., Gum, J. L. & 16 others, Hart, R. A., Isaacs, R. E., Sasso, R. C., Bumpass, D. B., Bydon, M., Corriveau, M., De Giacomo, A. F., Derakhshan, A., Jobse, B. C., Lubelski, D., Lee, S., Massicotte, E. M., Pace, J. R., Smith, G. A., Than, K. D. & Riew, K. D., Apr 1 2017, In : Global Spine Journal. 7, 1_suppl, p. 58S-63S

Research output: Contribution to journalArticle

Tears
Multicenter Studies
Neck
Therapeutics
Reoperation
7 Citations (Scopus)

Anterior cervical infection: Presentation and incidence of an uncommon postoperative complication

Ghobrial, G. M., Harrop, J. S., Sasso, R. C., Tannoury, C. A., Tannoury, T., Smith, Z. A., Hsu, W. K., Arnold, P. M., Fehlings, M. G., Mroz, T. E., De Giacomo, A. F., Jobse, B. C., Rahman, RK. K., Thompson, S. E. & Riew, K. D., Apr 1 2017, In : Global Spine Journal. 7, 1_suppl, p. 12S-16S

Research output: Contribution to journalArticle

Diskectomy
Incidence
Infection
Spine
Databases
14 Citations (Scopus)

Athletic performance and career longevity following anterior cruciate ligament reconstruction in the National Basketball Association

Kester, B. S., Behery, O. A., Minhas, S. V. & Hsu, W. K., Oct 1 2017, In : Knee Surgery, Sports Traumatology, Arthroscopy. 25, 10, p. 3031-3037 7 p.

Research output: Contribution to journalArticle

Basketball
Athletic Performance
Anterior Cruciate Ligament Reconstruction
Wounds and Injuries
Knee

Basic science of bone fusion

Weiner, J. A. & Hsu, W. K., Jan 1 2017, Essentials of Spinal Stabilization. Springer International Publishing, p. 471-485 15 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

Spine
Bone and Bones
Arthrodesis
Anatomy
Histology
4 Citations (Scopus)

Brachial plexopathy after cervical Spine surgery

Than, K. D., Mummaneni, P. V., Smith, Z. A., Hsu, W. K., Arnold, P. M., Fehlings, M. G., Mroz, T. E. & Riew, K. D., Apr 1 2017, In : Global Spine Journal. 7, 1_suppl, p. 17S-20S

Research output: Contribution to journalArticle

Brachial Plexus Neuropathies
Spine
Ossification of Posterior Longitudinal Ligament
National Library of Medicine (U.S.)
Patient Positioning
10 Citations (Scopus)

C5 palsy after cervical Spine surgery: A multicenter retrospective review of 59 cases

Thompson, S. E., Smith, Z. A., Hsu, W. K., Nassr, A., Mroz, T. E., Fish, D. E., Wang, J. C., Fehlings, M. G., Tannoury, C. A., Tannoury, T., Tortolani, P. J., Traynelis, V. C., Gokaslan, Z., Hilibrand, A. S., Isaacs, R. E., Mummaneni, P. V., Chou, D., Qureshi, S. A., Cho, S. K., Baird, E. O. & 26 others, Sasso, R. C., Arnold, P. M., Buser, Z., Bydon, M., Clarke, M. J., De Giacomo, A. F., Derakhshan, A., Jobse, B., Lord, E. L., Lubelski, D., Massicotte, E. M., Steinmetz, M. P., Smith, G. A., Pace, J., Corriveau, M., Lee, S., Cha, P. I., Chatterjee, D., Gee, E. L., Mayer, E. N., McBride, O. J., Roe, A. K., Yanez, M. Y., Stroh, D. A., Than, K. D. & Riew, K. D., Apr 1 2017, In : Global Spine Journal. 7, 1_suppl, p. 64S-70S

Research output: Contribution to journalReview article

Paralysis
Spine
Lost to Follow-Up
Incidence

Can surgeon demographic factors predict postoperative complication rates after elective spinal fusion?

Chun, D. S., Cook, R. W., Weiner, J. A., Schallmo, M. S., Barth, K. A., Singh, S. K., Freshman, R. D., Patel, A. A. & Hsu, W. K., Jun 23 2017, In : Clinical Spine Surgery. 31, 2, p. 93-97 5 p.

Research output: Contribution to journalArticle

Spinal Fusion
Demography
Spine
Surgeons
Surgical Specialties
3 Citations (Scopus)

Complications associated with bone morphogenetic protein in the lumbar spine

Kang, D. G., Hsu, W. K. & Lehman, R. A., Mar 1 2017, In : Orthopedics. 40, 2, p. e229-e237

Research output: Contribution to journalReview article

Bone Morphogenetic Proteins
Spine
Seroma
Ejaculation
Osteolysis
3 Citations (Scopus)

Do Demographic Factors of Spine Surgeons Affect the Rate at Which Spinal Fusion Is Performed on Patients?

Schallmo, M. S., Cook, R. W., Weiner, J. A., Chun, D. S., Barth, K. A., Singh, S. K., Patel, A. A. & Hsu, W. K., Aug 15 2017, In : Spine. 42, 16, p. 1261-1266 6 p.

Research output: Contribution to journalArticle

Spinal Fusion
Spine
Demography
Medicare
Confidence Intervals
1 Citation (Scopus)

Effects of Conflicts of Interest on Practice Patterns and Complication Rates in Spine Surgery

Cook, R. W., Weiner, J. A., Schallmo, M. S., Chun, D. S., Barth, K. A., Singh, S. K. & Hsu, W. K., Sep 1 2017, In : Spine. 42, 17, p. 1322-1329 8 p.

Research output: Contribution to journalArticle

Conflict of Interest
Industry
Spine
Databases
Current Procedural Terminology
5 Citations (Scopus)

Epidemiology and outcomes of vertebral artery injury in 16 582 cervical spine surgery patients: An aospine North America multicenter study

Hsu, W. K., Kannan, A., Mai, H. T., Fehlings, M. G., Smith, Z. A., Traynelis, V. C., Gokaslan, Z. L., Hilibrand, A. S., Nassr, A., Arnold, P. M., Mroz, T. E., Bydon, M., Massicotte, E. M., Ray, W. Z., Steinmetz, M. P., Smith, G. A., Pace, J., Corriveau, M., Lee, S., Isaacs, R. E. & 4 others, Wang, J. C., Lord, E. L., Buser, Z. & Riew, K. D., Apr 1 2017, In : Global Spine Journal. 7, 1_suppl, p. 21S-27S

Research output: Contribution to journalArticle

Vertebral Artery
North America
Multicenter Studies
Epidemiology
Spine
5 Citations (Scopus)

Epidural hematoma following cervical Spine surgery

Schroeder, G. D., Hilibrand, A. S., Arnold, P. M., Fish, D. E., Wang, J. C., Gum, J. L., Smith, Z. A., Hsu, W. K., Gokaslan, Z. L., Isaacs, R. E., Kanter, A. S., Mroz, T. E., Nassr, A., Sasso, R. C., Fehlings, M. G., Buser, Z., Bydon, M., Cha, P. I., Chatterjee, D., Gee, E. L. & 9 others, Lord, E. L., Mayer, E. N., McBride, O. J., Nguyen, E. C., Roe, A. K., Tortolani, P. J., Stroh, D. A., Yanez, M. Y. & Riew, K. D., Apr 1 2017, In : Global Spine Journal. 7, 1_suppl, p. 120S-126S

Research output: Contribution to journalArticle

Hematoma
Spine
Neurologic Manifestations
Incidence
Quality of Life
4 Citations (Scopus)

Esophageal perforation following anterior cervical Spine surgery: Case report and review of the literature

Hershman, S. H., Kunkle, W. A., Kelly, M. P., Buchowski, J. M., Ray, W. Z., Bumpass, D. B., Gum, J. L., Peters, C. M., Singhatanadgige, W., Kim, J. Y., Smith, Z. A., Hsu, W. K., Nassr, A., Currier, B. L., Rahman, RK. K., Isaacs, R. E., Smith, J. S., Shaffrey, C., Thompson, S. E., Wang, J. C. & 6 others, Lord, E. L., Buser, Z., Arnold, P. M., Fehlings, M. G., Mroz, T. E. & Riew, K. D., Apr 1 2017, In : Global Spine Journal. 7, 1_suppl, p. 28S-36S

Research output: Contribution to journalReview article

Esophageal Perforation
Spine
Debridement
North America
Postoperative Period
6 Citations (Scopus)

Factors Associated with Financial Relationships between Spine Surgeons and Industry

Weiner, J. A., Cook, R. W., Hashmi, S., Schallmo, M. S., Chun, D. S., Barth, K. A., Singh, S. K., Patel, A. A. & Hsu, W. K., Sep 15 2017, In : Spine. 42, 18, p. 1412-1418 7 p.

Research output: Contribution to journalArticle

Industry
Spine
Demography
Databases
Linear Models
4 Citations (Scopus)

Future advances in spine surgery: The AOSpine North America perspective

Fehlings, M. G., Ahuja, C. S., Mroz, T., Hsu, W. K. & Harrop, J., Mar 1 2017, In : Clinical neurosurgery. 80, 3, p. S1-S8

Research output: Contribution to journalArticle

North America
Spine
Surgical Wound Infection
Radiosurgery
Spinal Cord Diseases
2 Citations (Scopus)

Iatrogenic Flatback and Flatback Syndrome

Boody, B. S., Rosenthal, B. D., Jenkins, T. J., Patel, A. A., Savage, J. W. & Hsu, W. K., Jan 1 2017, In : Clinical Spine Surgery. 30, 4, p. 142-149 8 p.

Research output: Contribution to journalArticle

Lordosis
Intervertebral Disc Degeneration
Kyphosis
Osteotomy
Gait
13 Citations (Scopus)

Intra-articular vancomycin powder eliminates methicillin-resistant S. aureus in a rat model of a contaminated intra-articular implant

Edelstein, A. I., Weiner, J. A., Cook, R. W., Chun, D. S., Monroe, E., Mitchell, S. M., Kannan, A., Hsu, W. K., David Stulberg, S. & Hsu, E. L., Jan 1 2017, In : Journal of Bone and Joint Surgery - American Volume. 99, 3, p. 232-238 7 p.

Research output: Contribution to journalArticle

Methicillin Resistance
Vancomycin
Powders
Joints
Methicillin-Resistant Staphylococcus aureus
1 Citation (Scopus)

Management of Lumbar Conditions in the Elite Athlete

Hsu, W. K. & Jenkins, T. J., Jul 1 2017, In : Journal of the American Academy of Orthopaedic Surgeons. 25, 7, p. 489-498 10 p.

Research output: Contribution to journalReview article

Athletes
Spondylolysis
Back Pain
Standard of Care
Wounds and Injuries
4 Citations (Scopus)

Mechanistic insight into the effects of Aryl Hydrocarbon Receptor activation on osteogenic differentiation

Yun, C., Weiner, J. A., Chun, D. S., Yun, J., Cook, R. W., Schallmo, M. S., Kannan, A. S., Mitchell, S. M., Freshman, R. D., Park, C., Hsu, W. K. & Hsu, E. L., Jun 1 2017, In : Bone Reports. 6, p. 51-59 9 p.

Research output: Contribution to journalArticle

Aryl Hydrocarbon Receptors
Dioxins
Bone Regeneration
Mesenchymal Stromal Cells
Bone and Bones
2 Citations (Scopus)

Misplaced cervical screws requiring reoperation

Peterson, J. C., Arnold, P. M., Smith, Z. A., Hsu, W. K., Fehlings, M. G., Hart, R. A., Hilibrand, A. S., Nassr, A., Rahman, RK. K., Tannoury, C. A., Tannoury, T., Mroz, T. E., Currier, B. L., De Giacomo, A. F., Fogelson, J. L., Jobse, B. C., Massicotte, E. M. & Riew, K. D., Apr 1 2017, In : Global Spine Journal. 7, 1_suppl, p. 46S-52S

Research output: Contribution to journalArticle

Reoperation
Spine
Costs and Cost Analysis
X Ray Computed Tomography
Research Ethics Committees
8 Citations (Scopus)

Novel osteobiologics and biomaterials in the treatment of spinal disorders

Hsu, W. K., Goldstein, C. L., Shamji, M. F., Cho, S. K., Arnold, P. M., Fehlings, M. G. & Mroz, T. E., Mar 1 2017, In : Clinical Neurosurgery. 80, 3, p. S100-S107

Research output: Contribution to journalArticle

Bone Morphogenetic Proteins
Nanotechnology
Knowledge Bases
Biocompatible Materials
Biological Products