1. Population Health Research Institute, McMaster University, Hamilton, Canada
2. Department of Medicine, McMaster University, 1280 Main St W, Hamilton, Canada
3. Department of Health Research Methods, Evidence, and Impact, McMaster University, 1280 Main St W, Hamilton, Canada
4. Iberoamerican Cochrane Center, Biomedical Research Institute Sant Pau (IIB Sant Pau-CIBERESP), Sant Antoni Maria Claret 167, Barcelona, Spain
5. Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong Special administrative Region, China
6. Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, 9500 Euclid Ave, Cleveland, OH, USA
7. Department of Clinical Research, Narayana Hrudayalaya Limited, 258/A, Hosur Road, Bommasandra Industrial Area, Anekal Taluk, Bangalore, India
8. Department of Anesthesiology and Perioperative Medicine, Kingston Health Sciences Centre and Queen's University, 76 Stuart St, Kingston, ON, Canada
9. Department of Anesthesiology, University of Malaya, Kuala Lumpur, Malaysia
10. Departamento de Investigaciones, Fundación Cardioinfantil –Instituto de Cardiología and Facultad de Ciencias de la Salud, Universidad Autónoma de Bucaramanga, Av. 42 ##48 - 11, Bucaramanga, Santander, Colombia
11. Department of Surgery, University of Manitoba, Rm. GE61, 820 Sherbrook Street, Winnipeg, MB R3A 1R9, Canada
12. School of Medicine, Universidad Peruana Cayetano Heredia, Av. Honorio Delgado 430, San Martín de Porres, Lima, Peru
13. Department of Medicine, University of Alberta, 116 St & 85 Ave, Edmonton, AB, Canada
14. Unidad de Investigacion Cientifica, Facultad de Medicina, Universidad de El Salvador, Final 25 Ave norte, San Salvador, El Salvador
15. Department of Anesthesia, Hospital General Universitario Gregorio Marañon, Calle del Dr. Esquerdo 46, Madrid, Spain
16. Department of Anesthesia & Perioperative Medicine, University of Western Ontario, 1151 Richmond St, London, ON, Canada
17. Department of Medicine, London Health Sciences Centre, Victoria Hospital, 800 Commissioners Rd E, London, ON, Canada
18. Department of Cardiology, Hospital de la Santa Creu i Sant Pau, CIBERCV, Biomedical Research Institute Sant Pau (IIB Sant Pau), Universitat Autonoma de Barcelona, Carrer de Sant Quintí, 89, Barcelona, Spain
19. Department of Anesthesia, McGill University Health Centre, McGill University, 1001 Decarie Blvd, Montreal, QC, Canada
20. Department of Epidemiology & Biostatistics, University of Western Ontario, 1151 Richmond St, London, ON, Canada
21. Department of Anaesthesia, Nelson R Mandela School of Medicine, University of KwaZulu-Natal, 719 Umbilo Road, Umbilo, South Africa