Huamaní Egocheaga, R., J. Miranda Candelario, C. Mejía Vásquez, and C. Campos Noriega. “Clinical and Serological Findings for Atypical Respiratory Infections in Asthmatic Children in Grau Emergency Hospital, EsSalud, 2007”. ACTA MEDICA PERUANA, Vol. 26, no. 3, Sept. 2009, pp. 162 -68, http://www.amp.cmp.org.pe/index.php/AMP/article/view/1517.