Prot# SB-275833/032: A Rndmzd, Dbl-Blnd, Dbl-Dummy, Mltcntr, Non-Inferiority Phase III Study to Assess the Safety & Efficacy of Topical 1% SB-275833 Ointment, Applied 2x Daily, v. Oral Cephalexin, 500mg in Adults, or 12.5mg/kg(250mg/5mL)in Child