1. Merck & Co., Inc., 2015 Galloping Hill Road, Kenilworth, New Jersey 07033 United States,
2. Peptide Chemistry Unit, Peptides and Small Molecules R&D, IRBM SpA, Via Pontina, Km 30.600, 00071 Roma, Italy
3. PeptiPharma, Viale Citta D’Europa 679, 00144 Roma, Italy