Department of Psychology, University of British Columbia; Vancouver Coastal Health Research Institute; Djavad Mowafaghian Centre for Brain Health, Vancouver, British Columbia, Canada; 2136 West Mall, Vancouver, British Columbia, Canada, V6T 1Z4. Electronic address: noah.silverberg@ubc.ca.

Department of Physical Medicine and Rehabilitation, Harvard Medical School; Spaulding Rehabilitation Hospital and the Schoen Adams Research Institute at Spaulding Rehabilitation; MassGeneral Hospital for Children Sports Concussion Program; & Home Base, A Red Sox Foundation and Massachusetts General Hospital Program, Boston, Massachusetts, USA; 79/96 Thirteenth Street, Charlestown Navy Yard, Charlestown, MA, 02129. Electronic address: giverson@mgh.harvard.edu.

Center for the Study of Healthcare Innovation, Implementation & Policy; VA Greater Los Angeles Healthcare System; 11301 Wilshire Blvd, Los Angeles, CA 90073. Electronic address: alisonc79@gmail.com.

Department of Rehabilitation and Human Performance & Department of Neurology, Brain Injury Research Center of Mount Sinai, Box 1163, Icahn School of Medicine at Mount Sinai, New York, NY, USA 10029. Electronic address: kristen.dams-o’connor@mountsinai.org.

Kaiser Foundation Rehabilitation Center, The Permanente Medical Group, Kaiser Permanente, Northern California, 975 Sereno Drive, Vallejo, CA, USA 94589. Electronic address: richard.l.delmonico@kp.org.

Department of Physical Medicine and Rehabilitation, Hennepin Healthcare; Department of Rehabilitation Medicine, University of Minnesota, 701 Park Ave, Minneapolis, MN, USA 55415. Electronic address: minjeong.graf@hcmed.org.

Department of Physical Medicine and Rehabilitation, Massachusetts General Hospital, Harvard Medical School, 300 1(st) Ave, Charlestown, MA, USA 02129; Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Harvard Medical School, 300 1(st) Ave, Charlestown, MA, USA 02129. Electronic address: miaccarino@mgh.havard.edu.

Department of Rehabilitation and Human Performance, Brain Injury Research Center of Mount Sinai, Box 1163, Icahn School of Medicine at Mount Sinai, New York, NY, USA 10029. Electronic address: maria.kajankova@mountsinai.org.

UCLA Steve Tisch BrainSPORT Program, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA, 300 Medical Plaza Ste B-200 Los Angeles, CA, USA 90095. Electronic address: jkamins@mednet.ucla.edu.

Division of Physical Therapy, Department of Health Sciences, School of Medicine, University of North Carolina at Chapel Hill, 3030 Bondurant Hall, CB# 7135, Chapel Hill, NC, USA 27599-7135. Electronic address: kmac@med.unc.edu.

Traumatic Brain Injury Center of Excellence, Defense Health Agency, 1335 East West Highway, Silver Spring, MD, USA 20910. Electronic address: gary.l.mckinney.civ@health.mil.

School of Professional and Applied Psychology, Philadelphia College of Osteopathic Medicine, 4170 City Ave, Philadelphia, PA, USA 19131. Electronic address: drew.nagele.psyd@gmail.com.

British Columbia Neuropsychiatry Program; Department of Psychiatry, University of British Columbia, 2255 Wesbrook Mall, UBC, Vancouver, BC, Canada, V6T2A1. Electronic address: will.panenka@ubc.ca.

Moss Rehabilitation Research Institute, 50 Township Line Rd., Elkins Park, PA, USA, 19027. Electronic address: rabinowa@einstein.edu.

Department of Occupational Science & Occupational Therapy, University of Toronto, 160-500 University Ave, Toronto, ON, Canada, M5G1V7. Electronic address: nick.reed@utoronto.ca.

Mayo Clinic School of Medicine, 13400 E Shea Blvd, Scottsdale, AZ, USA 85259. Electronic address: Wethe.Jennifer@mayo.edu.

MetroHealth Rehabilitation Institute and Case Western Reserve University; 2500 MetroHealth Drive, Cleveland, OH, USA 44109. Electronic address: vwhitehair@metrohealth.org.

Murdoch Children’s Research Institute; The Royal Children’s Hospital, 50 Flemington Road, Parkville, Victoria 3052 Australia. Electronic address: vicki.anderson@rch.org.au.

University of New Mexico School of Medicine; University of Colorado School of Medicine; 1635 Aurora Ct, Aurora, CO, USA 80045. Electronic address: david.arciniegas@cuanschutz.edu.

Toronto Rehabilitation Institute, University Health Network; University of Toronto; Room 3-102-12, 550 University Avenue, Toronto, Ontario, Canada, M5G2A2. Electronic address: mark.bayley@uhn.ca.

University of Rochester School of Medicine and Dentistry; 265 Crittenden Blvd Box 655c, Rochester, NY, USA 14642. Electronic address: jeff_bazarian@urmc.rochester.edu.

University of Texas Southwestern Medical Center; 5323 Harry Hines Blvd, Dallas, TX, USA, 75390. Electronic address: Kathleen.Bell@UTSouthwestern.edu.

University of Michigan, Michigan Concussion Center; 830 N University Ave., Ann Arbor, MI, USA 48109. Electronic address: broglio@umich.edu.

Department of Physical Medicine and Rehabilitation, Virginia Commonwealth University School of Medicine; U.S. Department of Veterans Affairs; 1223 East Marshall Street, Richmond, VA, USA 23298. Electronic address: dcifu@vcu.edu.

Cabrini Health; Suite 53 – Neurosurgery, Cabrini Malvern, Victoria, 3144, Australia. Electronic address: gavin.davis@me.com.

Schulthess Clinic, Department of Neurology, Swiss Concussion Center; Lengghalde 2, CH-8008, Switzerland. Electronic address: jiri@dvorakmedical.com.

University Orthopedics Center, Concussion Care Clinic; University of Missouri-Kansas City, Kansas City, Missouri, USA. 107 Picadilly Rd., Port Matilda, PA, USA 16870. Electronic address: rechemendia@comcast.net.

Division of Neuropsychology/ SCORE Concussion Program, Children’s National Hospital, George Washington University School of Medicine; 15245 Shady Grove Road #350, Rockville, MD, USA 20850. Electronic address: ggioia@childrensnational.org.

University of California at Los Angeles, Departments of Neurosurgery and Pediatrics, Steve Tisch BrainSPORT Program; Room 557 Wasserman, Department of Neurosurgery, 300 Stein Plaza, UCLA, Los Angeles, CA, USA 90095. Electronic address: cgiza@mednet.ucla.edu.

Uniformed Services University, Department of Neurology and Radiology, 4301 Jones Bridge Rd, Bethesda, MD 20814. Electronic address: sidney.r.hinds@gmail.com.

Department of Neurology, Boston University School of Medicine; 72 E. Concord St. Robinson (B3), Boston University School of Medicine, Boston, MA, USA 02118. Electronic address: dkatz@bu.edu.

Division of Pediatric Rehabilitation Medicine, Cincinnati Children’s Hospital Medical Center, Departments of Pediatrics, Neurology, and Rehabilitation Medicine, University of Cincinnati College of Medicine; 3333 Burnet Avenue, MLC 4009, Cincinnati, OH, USA 45229. Electronic address: brad.kurowski@cchmc.org.

UBMD Department of Orthopaedics and Sports Medicine; SUNY Buffalo Jacobs School of Medicine and Biomedical Sciences; 160 Farber Hall, Buffalo, NY, USA 14214. Electronic address: leddy@buffalo.edu.

Population Health and Optimal Health Practices Axis, CHU de Québec-Université Laval Research Centre; VITAM-Centre de recherche en santé durable; 1401, 18e rue, Québec, Canada, G1J 1Z4. Electronic address: natalie.lesage@fmed.ulaval.ca.

Department of Emergency Medicine, Stanford University; 900 Welch Road, Stanford, CA, USA 94303. Electronic address: alumba@stanford.edu.

Antwerp University Hospital, Edegem, and University of Antwerp; Drie Eikenstraat 655, 2650 Edegem, Belgium. Electronic address: andrew.maas@uza.be.

Department of Neurosurgery, University of California, San Francisco; 1001 Potrero Ave, San Francisco, CA, USA 94110. Electronic address: manleyg@ucsf.edu.

Medical College of Wisconsin; 8701 Watertown Plank Road, Milwaukee, WI, USA 53226. Electronic address: mmccrea@mcw.edu.

University of Cambridge; Box 93, Addenbrooke’s Hospital, Cambridge CB2 2QQ, UK. Electronic address: dkm13@cam.ac.uk.

Monash University; 18 Innovation Walk, Clayton campus, VIC 3800, Australia. Electronic address: jennie.ponsford@monash.edu.

Consultant, Major League Soccer; Princeton, NJ, USA 08540. Electronic address: mputukian@gmail.com.

Kennedy Krieger Institute and Department of Physical Medicine & Rehabilitation, Johns Hopkins University School of Medicine; 707 North Broadway, Baltimore, MD, USA 21205. Electronic address: suskauer@kennedykrieger.org.

Department of Neurology, University of Groningen, University Medical Center Groningen; Netherlands. Electronic address: j.van.der.naalt@umcg.nl.

Virginia Commonwealth University; 1223 East Marshall Street, 4(th) Fl., Box 980677, Richmond, VA, USA 23298-0677. Electronic address: William.walker@vcuhealth.org.

Department of Psychology, Alberta Children’s Hospital Research Institute, and Hotchkiss Brain Institute, University of Calgary; 2500 University Dr NW, Calgary, AB T2N 1N4, Canada. Electronic address: kyeates@ucalgary.ca.

Department of Physical Medicine and Rehabilitation Spaulding Rehabilitation Hospital/Massachusetts General Hospital/Brigham and Women’s Hospital/Harvard Medical School; 300 First Avenue, Boston, MA, USA 02129. Electronic address: rzafonte@mgh.harvard.edu.

Concussion Care Centre of Virginia, Ltd.; 3721 Westerre Parkway, Suite B, Henrico, VA, USA 23233. Electronic address: nzasler@cccv-Itd.com.

Departments of Pediatrics and Emergency Medicine, University of Ottawa; Children’s Hospital of Eastern Ontario; 401 Smyth Road, Ottawa, ON, Canada, K1H 8L1. Electronic address: rzemek@cheo.on.ca.