[1] Department of Research in Human Genetics,
[2] Instituto Nacional de Pediatría,undefined
[3] Insurgentes Sur 3700-C,undefined
[4] CP. 04530,undefined
[5] Mexico,undefined
[6] DF e-mail: cesmer_98@yahoo.com Fax: +52-5-6069455,undefined
[7] Outpatient Department,undefined
[8] Instituto Nacional de Pediatría,undefined
[9] Insurgentes Sur 3700-C,undefined
[10] Insurgentes-Cuicuilco,undefined
[11] Tlalpan,undefined
[12] CP. 04530,undefined
[13] Mexico,undefined
[14] DF,undefined
[15] Department of Pathology,undefined
[16] Instituto Nacional de Pediatría,undefined
[17] Insurgentes Sur 3700-C,undefined
[18] Insurgentes-Cuicuilco,undefined
[19] Tlalpan,undefined
[20] CP. 04530,undefined
[21] Mexico,undefined
[22] DF,undefined