ACKNOWLEDGMENTS
We gratefully acknowledge the contribution of children and parents, general practitioners, hospitals and midwives, and pharmacies in pharmacies in Rotterdam. We thank the following parties for financially supporting our work: IFECYCLE, grant agreement No 733206, 2016; EUCAN-Connect grant agreement No 824989; ATHLETE, grant agreement No 874583; Australian National Health and Medical Research Council, Grant/Award Number: 1117687; European Union’s Horizon 2020 research and innovation programme, Grant/Award Number: 733206; European Union’s Horizon 2020 co‐funded programme ERA‐Net on Biomarkers for Nutrition and Health (ERA HDHL), Grant/Award Number: 696295. The Department of Dermatology of the Erasmus MC University Medical Center Rotterdam received an unrestricted grant from Micreos Human Health, The Netherlands. The funders had no role in the design or conduct of the study; the collection of the data and analyses; the interpretation of data; the preparation and review or approval of the manuscript; or the decision to submit the manuscript.