[1] Hosp Especialidades Ctr Med La Raza, Mexicali, Baja California, Mexico
[2] Hosp Gen Reg 110 IMSS, Mexicali, Baja California, Mexico
[3] Univ Guadalajara, Mexicali, Baja California, Mexico
[4] Arthritis & Osteoporosis Res Ctr, Mexicali, Baja California, Mexico