1. University of Oxford, Oxford, United Kingdom (L.G., R.W., R.C., R.C., W.G.H., M.H., S.L., R.P., J.R.E.)
2. National Autonomous University of Mexico, Mexico City, Mexico (J.A., R.R., R.T., A.G., C.G., M.S., P.K.)
3. Salvador Zubirán National Institute of Medical Sciences and Nutrition, Mexico City, Mexico (E.C.)