1. Department of Discovery Chemistry, Merck & Co., Inc., 33 Ave. Louis Pasteur, Boston, Massachusetts 02215, United States
2. Analytical Research & Development, Merck & Co., Inc., 33 Ave. Louis Pasteur, Boston, Massachusetts 02215, United States
3. Analytical Research and Development, Merck & Co., Inc., 126 E. Lincoln Ave., Rahway, New Jersey 07065, United States