The HMSA is the only charity offering both practical support and Information Standards Accredited health and care information to people who have a hypermobility syndrome. or who are involved in the care of someone with any of the hypermobility syndromes, including Joint Hypermobility Syndrome, Ehlers-Danlos syndrome (all sub-types), Marfan syndrome, Sticklers and Osteogenesis Imperfecta.