Comorbidity burden in terms of disability in patients with osteoarthritis in Mexico. The IMPACTAR registry
David Vega-Morales; Jorge Antonio Esquivel-Valerio; Brenda Roxana Vázquez-Fuentes; Alejandro Díaz-Borjón; César Alejandro Arce-Salinas; Everardo Álvarez-Hernández; José Fernando Torres-Roldán; José Manuel Aguilera-Zepeda; Víctor Toledo-Infanson; Ernesto Alcántar-Luna; Jorge Antonio Aldrete-Velasco; José Luis Martínez Hernández; Jaime José Gutiérrez-Gómez; Rolando Espinosa-Morales;