Factors associated with uptake of influenza vaccine in people aged 50 to 64 years in Hong Kong: a case-control study.Published in:BMC Public Health, 2015, v. 15, n. 1, p. 1, doi. 10.1186/s12889-015-1990-0By:Yeung, May P. S.;Ng, Stephen Kam-Cheung;Fai Tong, Edmond Tak;Chan, Stephen Sek-Kam;Coker, RichardPublication type:Article