Department of Dermatology, Environmental Medicine and Health Theory, University of Osnabrück, Osnabrück, Germany

Department of Immunobiology, Yale University, New Haven, CT, USA; Neonatal-Perinatal Medicine, Department of Pediatrics, Yale University School of Medicine, New Haven, CT, USA; Center for Systems and Engineering Immunology, Yale University, New Haven, CT, USA; Department of Obstetrics, Gynecology, & Reproductive Sciences, Yale University School of Medicine, New Haven, CT, USA

Checkerspot Inc., Alameda, CA 9450, USA

Larsson Rosenquist Foundation - Centre for Immunology and Breastfeeding, The University of Western Australia and The Kids Research Institute, Perth, Australia

Department Woman-Mother-Child, Division of Pediatrics, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland

Department of Paediatrics, University of Pécs, Pécs, Hungary

Gulbali Institute for Agriculture, Water and Environment, School of Agricultural, Environmental and Veterinary Science, Charles Sturt University, Wagga Wagga, Australia

Neonatology Department, Maternité Régionale Universitaire—CHRU Nancy, Nancy, France

Lausanne University Hospital, Lausanne, Switzerland

Department of Neonatology, University Hospital, François Rabelais University, Tours, France; UMR 1280 PhAN-INRAE, University Hospital, Nantes, France

Human Milk Foundation, Gossoms End NHS Health Centre, Berkhamsted, UK