Norovirus illness is a global problem: emergence and spread of norovirus gii.4 variants, 2001-2007
Siebenga, J. Joukje; Vennema, Harry; Zheng, Du Ping; Vinjé, Jan; Bonita, E.; Lee, Xiao Li Pang; Ho, Eric C.M.; Lim, Wilina; Choudekar, Avinash; Broor, Shobha; Halperin, Tamar; Rasool, Nassar B.G.; Hewitt, Joanne; Greening, Gail E.; Jin, Miao; Duan, Zhao Jun; Lucero, Yald (2009)