Development and Implementation of an Online Patient Education Program for Children and Adolescents With Myalgic Encephalomyelitis/Chronic Fatigue Syndrome, Their Parents, Siblings, and School Personnel: Protocol for the Prospective BAYNET FOR ME/CFS Study - Franca Keicher; Julia Thomann; Jana Erlenwein; Mara Schottdorf; Nils Lennart Reiter; Nadine Patricia Scholz-Schwärzler; Barbara Vogel; Cordula Warlitz; Silvia Stojanov; Silvia Augustin; Lola Goldbrunner; Linda Schanz; et al. (JMIR Research Protocols)