[1] Hosp Reg Dr Valentin Gomez Farias, Dept Cirugia Gen, ISSSTE Zapopan, Zapopan 45150, Jalisco, Mexico
[2] IMSS Jalisco, Unidad Invest Social Epidemiol & Serv Salud, Guadalajara, Jalisco, Mexico
[3] Hosp Reg Dr Valentin Gomez Farias, Dept Invest, ISSSTE Zapopan, Zapopan 45150, Jalisco, Mexico