1 Department of Geriatrics and Aging Research, University Hospital and University of Zurich, Zurich 8091, Switzerland. Electronic address: [email protected].
2 Department of Biostatistics, Harvard School of Public Health, Boston, MA, USA.
3 Department of Geriatrics and Aging Research, University Hospital and University of Zurich, Zurich 8091, Switzerland.
4 Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, USA.
5 Department of Nutrition, Harvard School of Public Health, Boston, MA, USA.