1 BUC (Biosciences UAM+CSIC) Program, International Campus of Excellence, Universidad Autónoma de Madrid, E-28049 Madrid, Spain rafael.dalre@fuam.uam.es.
2 Center for Perinatal, Pediatric, and Environmental Epidemiology, Schools of Public Health and Medicine, Yale University, New Haven, CT, USA.
3 Stanford Prevention Research Center, Department of Medicine, Department of Health Research and Policy, Stanford University School of Medicine, Department of Statistics, Stanford University School of Humanities and Sciences, Meta-Research Innovation Center at Stanford (METRICS), Stanford, CA, USA.