Authors: Lyubov Lytvyn; Reed A Siemieniuk; Sophie Dilmitis; Allyson Ion; Yaping Chang; Malgorzata M Bala; Veena Manja; Reza Mirza; Rene Rodriguez-Gutierrez; Hassan Mir; Regina El Dib; Laura Banfield; Per Olav Vandvik; Susan Bewley Journal: BMJ Open Date: 2017-09-11 Impact factor: 2.692