1. Office of Biostatistics, Division of Biometrics VIII, U.S. Food and Drug Administration, Silver Spring, MD, USA
2. Office of Generic Drugs, Office of Bioequivalence, Division of Clinical Review, U.S. Food and Drug Administration, Silver Spring, MD, USA
3. Division of Therapeutic Performance, Office of Research and Standards, Office of Generic Drugs, U.S. Food and Drug Administration, Silver Spring, MD, USA