BMJ
Li S, Vandvik PO, Lytvyn L, Guyatt GH, Palmer SC, Rodriguez-Gutierrez R, Foroutan F, Agoritsas T, Siemieniuk RAC, Walsh M, Frere L, Tunnicliffe DJ, Nagler EV, Manja V, Åsvold BO, Jha V, Vermandere M, Gariani K, Zhao Q, Ren Y, Cartwright EJ, Gee P, Wickes A, Ferns L, Wright R, Li L, Hao Q, Mustafa RA
doi: 10.1136/bmj.n1091