1. From the Department of Physiology, University of Lausanne, Lausanne, Switzerland (K-AL, DF, RS, and LT); the University Institute of Social and Preventive Medicine, Lausanne, Switzerland (DF); the Department of Clinical Research, MR Spectroscopy and Methodology, University of Bern, Bern, Switzerland (MI, RK, PV, and CB); the Pennington Biomedical Research Center, Baton Rouge, LA (ER); and the Div