1 Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON L8S 4L8, Canada.
2 Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
3 Department of Preventive and Restorative Sciences; Center for Integrative Global Oral Health, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.
4 School of Psychology, University of Sydney, Sydney, NSW, Australia.
5 Vrije Universiteit Medical Centre Amsterdam, Department of General Practice, Amsterdam, Netherlands.
6 Amsterdam Public Health Research Institute, Methodology, Amsterdam, Netherlands.
7 Vrije Universiteit Medical Centre Amsterdam, Department of Epidemiology and Data Science, Amsterdam, Netherlands.
8 Department of Medicine, McMaster University, Hamilton, ON, Canada.
9 Population Health Research Institute, Hamilton Health Sciences/McMaster University, Hamilton, ON, Canada.
10 Department of Health Promotion and Human Behavior, Kyoto University Graduate School of Medicine/School of Public Health, Kyoto, Japan.
11 Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON L8S 4L8, Canada guyatt@mcmaster.ca.