1. Department of Internal Medicine, Berkshire Medical Center, Pittsfield, MA 02101, USA
2. Division of Endocrinology, Mount Auburn Hospital, Cambridge, MA 02138, USA
3. Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
4. Department of Medicine, Mount Auburn Hospital, Cambridge, MA 02138, USA
5. Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
6. Division of Reproductive Endocrinology & Infertility, Department of Obstetrics, Gynecology & Reproductive Sciences, Yale School of Medicine, New Haven, CT 06510, USA