1 Division of Endocrinology and Metabolism, Department of Medicine, New York University Grossman School of Medicine, 435 East 30th Street, New York, NY 10016, USA. Electronic address: connie.newman@nyulangone.org.
2 Division of Metabolism, Endocrinology and Nutrition, Department of Medicine, University of Washington, 850 Republican Street, Mailstop 358062, Seattle, WA 98109, USA. Electronic address: achait@uw.edu.