Dwyer Terence, Magnus Per, Olsen Jørn
Nuffield Department of Obstetrics and Gynecology, The George Institute for Global Health, University of Oxford, Oxford, United Kingdom.
Norwegian Institute of Public Health, Oslo, Norway.
JAMA Pediatr. 2017 Mar 1;171(3):214-215. doi: 10.1001/jamapediatrics.2016.3968.