. 2014 May 8;71(2):213–218. doi: 10.1111/2049-632X.12171
Published 2014. This article is a US Government work and is in the public domain in the USA.
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.