Correction: Serial casting for contractures in SMA: consensus derived guidelines for treatment - Laurey Brown; Katie Hoffman; Chiara Corbo-Galli; Carolyn Kelley; Terri Carry; Matt Civitello; Giorgia Coratti; Roberto DeSanctis; Tina Duong; Brigid Driscoll; Jean Flickinger; Allan M. Glanzman; et al. (Frontiers in Neurology)