1. Division of Pharmaceutical Outcomes and Policy, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill
2. Shaw University, Institute for Health, Social, and Community Research, Raleigh, NC
3. Eshelman School of Pharmacy, University of North Carolina at Chapel Hill; now, Statistician, Department of Nonclinical Statistics, Merck & Co., Inc., West Point, PA
4. Division of Biostatistics, School of Medicine, Indiana University, Indianapolis, IN; Regenstrief Institute, Inc., Indianapolis
5. Division of Biostatistics, School of Medicine, Indiana University
6. Eshelman School of Pharmacy, University of North Carolina at Chapel Hill; Regenstrief Institute, Inc.