| Affiliation: | 1. Office of Research and Standards, Office of Generic Drugs, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, 10903 New Hampshire Ave., Silver Spring, MD 20993, USA;2. Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, Maryland, USA;3. Controlled Substance Staff, Controlled Substance Program, Office of the Center Director, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, Maryland, USA;4. Division of Anesthesia, Analgesia, and Addiction Products, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, USA |
