Sildenafil therapy in thalassemia patients with Doppler-defined risk of pulmonary hypertension

Claudia R. Morris, Hae Young Kim, John Wood, John B. Porter, Elizabeth S. Klings, Felicia L. Trachtenberg, Nancy Sweeters, Nancy F. Olivieri, Janet L. Kwiatkowski, Lisa Virzi, Sylvia T. Singer, Ali Taher, Ellis J. Neufeld, Alexis A. Thompson, Vandana Sachdev, Sandra Larkin, Jung H. Suh, Frans A. Kuypers, Elliott P. Vichinsky