1 Infectious and Tropical Diseases Unit, Pediatric Department, Hospital Universitario La Paz, IdiPAZ and Spanish Cohort of HIV Infected Children (CoRISpe), and tsainzcosta@gmail.com.
2 Infectious Diseases Unit, Pediatric Department, Hospital General Universitario Gregorio Marañón and Spanish Cohort of HIV-Infected Children (CoRISpe), Madrid, Spain.