00603nas a2200217   4500000000100000008004100001260001300042653002900055653001100084653002700095653002300122653001200145653002000157100001500177245007100192856005900263300001000322490000700332050003200339022001400371       1975                            d  c1975 Jun10aClinical Trials as Topic10aHumans10aImmunologic Techniques10aLeprostatic Agents10aleprosy10aResearch Design1 aRidley D S00aProblems in the design of medium and long-term therapeutic trials.  uhttp://leprev.ilsl.br/pdfs/1975/v46s1/pdf/v46s1a08.pdf  a59-610 v46  aInfolep Library - available  a0305-7518