1. Analytical Research & Development, Merck & Co. Inc., West Point, Pennsylvania 19486, United States
2. Analytical Research & Development, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States
3. Transporters & In Vitro Technologies, PPDM, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States