1. Department of Epidemiology University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
2. Center for Pharmacoepidemiology and Treatment Sciences, Institutes for Health Rutgers University New Brunswick New Jersey USA
3. Rutgers Cancer Institute of New Jersey New Brunswick New Jersey USA
4. Lineberger Comprehensive Cancer Center University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
5. Department of Medicine University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
6. Department of Pathology and Laboratory Medicine University of North Carolina at Chapel Hill Chapel Hill North Carolina USA