Daisy Duan1, Chenjuan Gu2, Jonathan C Jun3. 1. Division of Endocrinology, Diabetes and Metabolism, Dept of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA. 2. Division of Pulmonary and Critical Care Medicine, Dept of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA. 3. Division of Pulmonary and Critical Care Medicine, Dept of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA jjun2@jhmi.edu.