Topical clindamycin versus systemic tetracycline.
D000152:Acne Vulgaris / Q000188:drug therapy*; D000287:Administration, Topical; D002981:Clindamycin / Q000008:administration & dosage*; D006801:Humans; D013752:Tetracycline / Q000008:administration & dosage*
D002981:Clindamycin; D013752:Tetracycline