Affiliation: | 1.Department of Public Health-Faculty of Medicine,University of Glasgow,UK;2.BBV and STI Section, Health Protection Scotland,Glasgow,UK;3.Department of Mathematics and Statistics,University of Strathclyde,Glasgow,UK;4.Public Health Protection Unit, NHS Greater Glasgow & Clyde,Glasgow,UK;5.Institute for Applied Social and Health Research,University of the West of Scotland,Paisley,UK |