1. Department of Statistics and Operations Research, University of North Carolina, Chapel Hill, NC;
2. Boehringer Ingelheim Pharmaceuticals, Inc., Ridgefield, CT;
3. Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN;
4. Department of Statistics and Operations Research, Department of Genetics, Department of Biostatistics, Carolina Center for Genome Sciences, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC