Corrigendum: Pilot Randomized Controlled Trial of an Exercise Program Requiring Minimal In-person Visits for Youth With Persistent Sport-Related Concussion - Chrisman, Sara P. D.; Whitlock, Kathryn B.; Mendoza, Jason A.; Burton, Monique S.; Somers, Ellie; Hsu, Albert; Fay, Lauren; Palermo, Tonya M.; Rivara, Frederick P. (Frontiers in Neurology, 2020)