1. From the Department of Earth and Planetary Sciences (AHJ and RAK) and the Welch Center for Prevention, Epidemiology and Clinical Research (EHY and WHLK), The Johns Hopkins University, Baltimore, MD; the Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD (CS); and the Department of Epidemiology (EHY and WHLK) and the Center for Human Nutrition (BC), The Johns Ho