na INLIS000000000011224 20231116012659 0010-0219000016 231116 0 ind - 614.4 614.4 Elw c Elwood, Mark Critical Appraisal of Epidemiological Studies and Clinical Trials / Mark Elwood United State : Oxford University, 2000. v, 448 p, ; 24 cm. Epidemiology 110162 110163 110164 110166