00355nam a22000977a 4500020002400000082001500024100001800039245003400057260003800091650012800129  a9789374735947 (pbk)  a174.2bDHI  aDhikav, Vikas  aTextbook of clinical research  aNew DehlibAitbs Publishersc2017  aClinical researchaPsychologyvCalculating samplevStudy designvClinical epidemiologyvDrug regulationvMeta analysisvPSY