Department of Laboratory Medicine, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands. Center for Primary Health Care Research, Lund University, 205 02 Malmö, Sweden. Faculty of Biomedical and Health Sciences, Universidad Europea de Madrid, 28670 Madrid, Spain. Centro de Estudios Avanzados en Nutrición (CEAN), 11007 Cádiz, Spain. Natura Foundation, 3281 NC Numansdorp, The Netherlands. Faculty of Sport Sciences, Universidad Europea de Madrid, 28670 Madrid, Spain. Physical Activity and Health Research Group ('PaHerg'), Research Institute of the Hospital 12 de Octubre ('imas12'), 28041 Madrid, Spain. Biomedical Research Networking Center on Frailty and Healthy Aging (CIBERFES), 28029 Madrid, Spain. Stanford 1000 Immunomes Project, Stanford University School of Medicine, Stanford, CA 94305, USA. Buck Artificial Intelligence Platform, The Buck Institute for Research on Aging, Novato, CA 94945, USA. Edifice Health Inc., San Mateo, CA 94401, USA. Austral Institute for Applied Artificial Intelligence, Institute for Research in Translational Medicine (IIMT), Universidad Austral, National Scientific and Technical Research Council (CONICET), Buenos Aires 2290, Argentina.