1. Biostatistics and Research Decision Sciences, Merck & Co., Inc. , Rahway, NJ 07065, USA
2. Data and Genome Science, Merck & Co., Inc. , Cambridge, MA 02141, USA
3. Department of Epidemiology and Biostatistics, University of California Irvine , Irvine, CA 92697, USA
4. Biostatistics and Research Decision Sciences, Merck & Co., Inc. , North Wales, PA 19454, USA