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1 Division of Musculoskeletal and Rheumatic Disorders, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Calzada Mexico-Xochimilco 289, Colonia Arenal de Guadalupe, Alcaldía Tlalpan, CP 143898, Mexico City, Mexico. carpineda@yahoo.com.
2 Division of Musculoskeletal and Rheumatic Disorders, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Calzada Mexico-Xochimilco 289, Colonia Arenal de Guadalupe, Alcaldía Tlalpan, CP 143898, Mexico City, Mexico.
3 Sociomedical Research Unit, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Mexico City, Mexico.
1 Division of Musculoskeletal and Rheumatic Disorders, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Calzada Mexico-Xochimilco 289, Colonia Arenal de Guadalupe, Alcaldía Tlalpan, CP 143898, Mexico City, Mexico. carpineda@yahoo.com.
2 Division of Musculoskeletal and Rheumatic Disorders, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Calzada Mexico-Xochimilco 289, Colonia Arenal de Guadalupe, Alcaldía Tlalpan, CP 143898, Mexico City, Mexico.
3 Sociomedical Research Unit, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Mexico City, Mexico.