1. Roy and Diana Vagelos Division of Biology and Biomedical Sciences, Washington University School of Medicine , St. Louis, MO 63110 , United States
2. Division of Endocrinology, Metabolism, and Lipid Research, Washington University School of Medicine , St. Louis, MO 63110 , United States
3. Department of Biomedical Engineering, Washington University in St. Louis , St. Louis, MO 63110 , United States