00403nam a22001217a 4500020002400000082001500024100001800039245003400057260003800091650012800129942000700257999001700264  a9789374735947 (pbk)  a174.2bDHI  aDhikav, Vikas  aTextbook of clinical research  aNew DehlibAitbs Publishersc2017  aClinical researchaPsychologyvCalculating samplevStudy designvClinical epidemiologyvDrug regulationvMeta analysisvPSY  cBK  c17416d17416