Commentary: collaborative systematic review may produce and share high-quality, comparative evidence more efficiently.

Address: Department of Community Health & Epidemiology, Dalhousie University, Halifax, Canada. Electronic address: [email protected].; Department of Community Health & Epidemiology, Dalhousie University, Halifax, Canada.; Faculty of Medicine, Dalhousie University, Halifax, Canada.; Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Chiropractic Knowledge Hub, Odense, Denmark.; Institute for Musculoskeletal Health, The University of Sydney, Sydney, Australia; Sydney Local Health District, Sydney, Australia.; Division of Physiatry, Department of Medicine, University of Toronto, Toronto, Canada; Institute of Work and Health, Toronto, Canada; Toronto Rehabilitation Institute, Toronto, Canada.; Cochrane, London, UK.; Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Canada; Centre for Global Health, University of Ottawa, Ottawa, Canada; WHO Collaborating Centre for Knowledge Translation and Health Technology Assessment in Health Equity, Bruyere Research Institute, Ottawa, Canada; Epidemiology & Community Medicine, University of Ottawa, Ottawa, Canada.; Faculty of Behavioural and Movement Sciences, Universiteit Amsterdam, Amsterdam, the Netherlands.; Clinical Policy and Center for Evidence Reviews, American College of Physicians, Philadelphia, Pennsylvania.; Institute of Bone and Joint Research, The University of Sydney, Sydney, Australia.; Monash Department of Clinical Epidemiology, Cabrini Institute, Melbourne, Australia; Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia; Cochrane Musculoskeletal, Melbourne, Australia.; Department of Family Medicine, University of Maryland School of Medicine, Baltimore, MD, USA.; Department of Physical Therapy, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil.; Discipline of Physiotherapy, Graduate School of Health, University of Technology Sydney, Sydney, Australia.; Masters and Doctoral Programs in Physical Therapy, Universidade Cidade de Sao Paulo, Sao Paulo, Brazil.; Department of Health Sciences, Faculty of Science and Amsterdam Movement Science Research Institute, Vrije Universiteit, Amsterdam, the Netherlands.; Centre for Nutrition and Rehabilitation, University College Absalon, Roskilde, Denmark.; School of Rehabilitation Science, McMaster University, Hamilton, Canada.; Michael & Susan Dell Center for Healthy Living, The University of Texas Health Science Center at Houston (UTHealth) School of Public Health, Austin, Texas.; Faculty of Health Sciences, Ontario Tech University, Oshawa, Canada.