Romundstad L B, Opdahl S, Pinborg A
Department of Public Health, Norwegian University of Science and Technology (NTNU), Trondheim, Norway Spiren Fertilitetsklinikk, IVF Unit, Trondheim, Norway
Department of Public Health, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.
BMJ. 2015 Jan 9;350:g7843. doi: 10.1136/bmj.g7843.