[1] Clin Psiquiatr Dr Everardo Neumann Pena, Invest, San Luis Potosi, San Luis Potosi, Mexico
[2] Univ Autonoma San Luis Potosi, Fac Med, Salud Publ, San Luis Potosi, San Luis Potosi, Mexico
[3] Univ Cuauhtemoc, Escuela Med, San Luis Potosi, San Luis Potosi, Mexico
[4] Univ Autonoma San Luis Potosi, Fac Med, Epidemiol, San Luis Potosi, San Luis Potosi, Mexico