1. Pellegrino MJ, Van Fossen D, Gordon C, Ryan JM, Waylonis GW (1989) Prevalence ofmitral valveprolapse in primaryfibromyalgia: a pilot investigation. Arch PhysMed Rehabil 70:541–543
2. Jones GT, Atzeni F, Beasley M, Flüß E, Sarzi-Puttini P, Macfarlane GJ (2015) The prevalence of fibromyalgia in the general population: a comparison of the american college of rheumatology 1990, 2010, and modified 2010 classification criteria. Arthritis Rheumatol 67:568–575
3. Waylonis GW, Heck W (1992) Fibromyalgia syndrome, New associations. Am J Phys Med Rehabil 71:343–348
4. Ofluoglu D, Gunduz OH, Kul-Panza E, Guven Z (2006) Hypermobility in women with fibromyalgia syndrome. ClinRheumatol 25:291–293
5. Ofluoglu D, Panza-Kul E, Gunduz OH, Guven Z (2004) The frequency of clinical signs in patients with fibromyalgia syndrome and the relationship between fibromyalgia syndrome and hypermobility. Turk J Phys Med Rehab 50:9–12