Authors: Mary Barker; Stephan U Dombrowski; Tim Colbourn; Caroline H D Fall; Natasha M Kriznik; Wendy T Lawrence; Shane A Norris; Gloria Ngaiza; Dilisha Patel; Jolene Skordis-Worrall; Falko F Sniehotta; Régine Steegers-Theunissen; Christina Vogel; Kathryn Woods-Townsend; Judith Stephenson Journal: Lancet Date: 2018-04-16 Impact factor: 79.321