Characterization of hospital and community-acquired respiratory syncytial virus in children with severe lower respiratory tract infections in Ho Chi Minh City, Vietnam, 2010 by Tuan, T, Thanh, T, Hai, N, Tinh, L, Kim, L, Do, L, Chinh B'Krong, N, Tham, N, Hang, V, Merson, L, Farrar, J, Thuong, T, de Jong, M, Schultsz, C, van Doorn, H