Neuroepidemiology and biostatistics.
D004311:Double-Blind Method; D004341:Drug Evaluation; D004813:Epidemiology; D006801:Humans; D009422:Nervous System Diseases / Q000188:drug therapy / Q000453:epidemiology*; D011446:Prospective Studies; D012107:Research Design; D012189:Retrospective Studies; D012306:Risk; D012494:Sampling Studies; D013223:Statistics as Topic