1. Department of Biostatistics and Computational Biology, School of Medicine and Dentistry, University of Rochester, Rochester, New York
2. Department of Statistics, The Wharton School, University of Pennsylvania, Philadelphia, Pennsylvania
3. Center for Pharmacoepidemiology Research and Training, Center for Clinical Epidemiology and Biostatistics and Department of Biostatistics and Epidemiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
4. Department of Healthcare Policy and Research, Weill Cornell Medical College, Cornell University, New York, New York