Frequency of coronavirus and rhinovirus in acut respiratory infections in children in Brazil - Macedo, Izolete Santos; Andrade, T. A.; Souza, L. S. F.; Velloso, L. F.; Camara, G. F.; Cintra, Otávio Augusto Leite; Silva, Maria Lúcia da; Ramos, E. A. G.; Arruda, L. K. (Annual Meeting American Society for Virology, 2003)