00754nam a2200205Ia 450000100070000000500170000700800410002402000250006504000100009008200270010024000360012724501070016325000250027026000690029530000250036450000450038950400510043465000340048570000290051924818620160527185329.0010404i19941998mx a   frf    001 0 spa d  a968-7988-03-7c86.95  aPUCPR00221a614.4bC641 E 199810aClinical epidemiology.lSpanish00aEpidemiología clínicabciencia básica para la medicina clínicacDavid L. Sackett ... [et al.].  a2da ed., 3ra reimpr.  aMéxico, D.F.bEditorial Médica Panamericanac(c) 1994, 1998.  a424 p.bill.c26 cm.  aFive Critical appraisal cards in pocket.  aIncludes bibliographical references and index. 0aClinical epidemiology.2Local10aSackett, David L.2Local