Musculoskeletal problems.
D000293:Adolescent; D001171:Arthritis, Juvenile / Q000628:therapy; D001847:Bone Diseases / Q000628:therapy*; D001842:Bone and Bones / Q000293:injuries; D006801:Humans; D007596:Joints / Q000293:injuries; D007719:Knee Joint; D009135:Muscular Diseases / Q000628:therapy*; D013167:Spondylitis, Ankylosing / Q000628:therapy