1. Affiliations of authors: Department of Medicine (MR), Department of Epidemiology and Biostatistics (ASR, MW, XL, JLB), Memorial Sloan Kettering Cancer Center, New York, NY (MR, ASR, MW, XL, JLB); Department of Medicine, Weill Cornell Medical College, Cornell University, New York, NY (MR); Epidemiology Division, University of Toronto, Dalla Lana School of Public Health Sciences, Toronto, ON, Canada (JDB, JAK); Genetics I