Narat Srivali1, Patompong Ungprasert2, Lee C Edmonds2. 1. Department of Internal Medicine, Bassett Medical Center and Columbia University College of Physicians and Surgeons, Cooperstown, NY 13326, USA. Electronic address: Narat.Srivali@bassett.org. 2. Department of Internal Medicine, Bassett Medical Center and Columbia University College of Physicians and Surgeons, Cooperstown, NY 13326, USA.