00580     2200217   4500001002100000005001500021035002000036008004100056020000600097082001000103084001600113100001700129245008500146260004600231300002400277650001700301990001100318990001100329990001100340990001100351INLIS00000000001122420231116012659  a0010-0219000016231116                           0 ind    a-  a614.4  a614.4 Elw c0 aElwood, Mark1 aCritical Appraisal of Epidemiological Studies and Clinical Trials /cMark Elwood  aUnited State :bOxford University,c2000.  av, 448 p, ;c24 cm.  aEpidemiology  a110162  a110163  a110164  a110166