Kramer Michael S, Zhang Xun, Platt Robert W
Department of Pediatrics, Faculty of Medicine, McGill University, Montreal, QC, Canada Department of Epidemiology, Biostatistics and Occupational Health, Faculty of Medicine, McGill University, Montreal, QC, Canada.
Department of Pediatrics, Faculty of Medicine, McGill University, Montreal, QC, Canada.
Am J Epidemiol. 2015 Feb 1;181(3):218-9. doi: 10.1093/aje/kwu464. Epub 2015 Jan 21.