1. Division of Endocrinology Department of Medicine and Naomi Berrie Diabetes Center Columbia University Medical Center New York NY 10033 USA
2. Dipartimento di Farmacia – Scienze del Farmaco Università degli Studi di Bari Aldo Moro Via Orabona 4 70125 Bari Italy
3. Department of Medicinal Chemistry Maj Institute of Pharmacology Polish Academy of Sciences Smetna 12 31-343 Krakow Poland