1 UK EQUATOR Centre, Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology & Musculoskeletal Sciences, University of Oxford, Oxford, UK.
2 Laboratory of Nutrition and Metabolic Epigenetics, Institute of Food, Nutrition and Health, ETH Zürich, LFV A44, Schmelzbergstrasse 7, Zürich, 8092, Switzerland. jessica.rigutto@hest.ethz.ch.