Epidemic West Nile encephalitis, New York, 1999: results of a household-based seroepidemiological survey. - Mostashari F; Bunning ML; Kitsutani PT; Singer DA; Nash D; Cooper MJ; Katz N; Liljebjelke KA; Biggerstaff BJ; Fine AD; Layton MC; Mullin SM; et al. (Lancet (London, England), 2001)