Patterns of viral pathogens causing upper respiratory tract infections among symptomatic children in Mwanza, Tanzania oleh Elizabeth Kwiyolecha, Britta Groendahl, Bernard Okamo, Neema Kayange, Festo Manyama, Benson R. Kidenya, Dina C. Mahamba, Delfina R. Msanga, Stephan Gehring, Mtebe Majigo, Stephen E. Mshana, Mariam M. Mirambo