Authors: Paul Garner; Sally Hopewell; Jackie Chandler; Harriet MacLehose; Holger J Schünemann; Elie A Akl; Joseph Beyene; Stephanie Chang; Rachel Churchill; Karin Dearness; Gordon Guyatt; Carol Lefebvre; Beth Liles; Rachel Marshall; Laura Martínez García; Chris Mavergames; Mona Nasser; Amir Qaseem; Margaret Sampson; Karla Soares-Weiser; Yemisi Takwoingi; Lehana Thabane; Marialena Trivella; Peter Tugwell; Emma Welsh; Ed C Wilson; Holger J Schünemann Journal: BMJ Date: 2016-07-20