Epidemiology of Influenza A Virus among Black-headed Gulls, the Netherlands, 2006-2010. - Verhagen, Josanne H.; Majoor, Frank; Lexmond, Pascal; Vuong, Oanh; Kasemir, Giny; Lutterop, Date; Osterhaus, Albert D.M.E.; Fouchier, Ron A.M.; Kuiken, Thijs (Emerging Infectious Diseases, 2014)