. 2008 Mar 28;35(8):1349–1361. doi: 10.1111/j.1365-2699.2008.01883.x
© 2008 The Authors. Journal compilation © 2008 Blackwell Publishing Ltd
This article is being made freely available through PubMed Central as part of the COVID-19 public health emergency response. It can be used for unrestricted research re-use and analysis in any form or by any means with acknowledgement of the original source, for the duration of the public health emergency.