. 2017 Apr 26;39(3):272–278. doi: 10.1111/ijlh.12620
© 2017 John Wiley & Sons 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.