1 Clinical Immunology Department, Instituto Nacional de Pediatría, Insurgentes Sur 3700-C, Insurgentes Cuicuilco, Coyoacán, 04530, Mexico City, CP, Mexico.
2 Pediatric Cardiology Department, Instituto Nacional de Pediatría, Insurgentes Sur 3700-C, Insurgentes Cuicuilco, Coyoacán, 04530, Mexico City, CP, Mexico.
3 Clinical Immunology Department, Instituto Nacional de Pediatría, Insurgentes Sur 3700-C, Insurgentes Cuicuilco, Coyoacán, 04530, Mexico City, CP, Mexico. yzki71@yahoo.com.mx.