The importance and difficulty of drug research in developing countries: a report from Kabul as timely reminder.
Westermeyer
J
J
D000293:Adolescent; D000328:Adult; D000346:Afghanistan / Q000453:epidemiology; D000368:Aged; D003906:Developing Countries / Q000706:statistics & numerical data; D004335:Drug and Narcotic Control / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012106:Research; D019966:Substance-Related Disorders / Q000453:epidemiology*; D014480:United Nations / Q000592:standards