aPublic Health and HIV Section, United Nations High Commissioner for Refugees, Geneva, Switzerland
bFaculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
cBritish Columbia Centre for Excellence in HIV/AIDS, St Paul's Hospital, Canada
dFaculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada.
Received 21 October, 2010
Accepted 27 October, 2010
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