title: Experimental requirements and scientific principles in case-control studies.
mesh_terms: D000293:Adolescent; D002648:Child; D002986:Clinical Trials as Topic / Q000379:methods*; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D010406:Penicillins / Q000627:therapeutic use; D011897:Random Allocation; D012107:Research Design / Q000592:standards*; D013290:Streptococcal Infections / Q000517:prevention & control
chemical_list: D010406:Penicillins