1. Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, Massachusetts 02115, United States
2. Merck & Co., Inc., 2015 Galloping Hill Road, Kenilworth, New Jersey 07033, United States
3. Peptide Chemistry Unit, Peptides and Small Molecules R&D, IRBM S.p.A., Via Pontina km 30600, 00071 Pomezia (RM), Italy