Johnson Owen A, Fraser Hamish S F, Wyatt Jeremy C, Walley John D
Leeds Institute for Health Sciences, University of Leeds, Leeds LS2 9PL, UK.
Leeds Institute for Health Sciences, University of Leeds, Leeds LS2 9PL, UK.
Lancet. 2014 Sep 13;384(9947):954. doi: 10.1016/S0140-6736(14)61626-3.