aDivision of Medical Virology, Stellenbosch University

bNational Health Laboratory Service, Tygerberg Business Unit, Cape Town, South Africa

cHIV Dynamics & Replication Program, Center for Cancer Research, NCI-Frederick, Frederick, Maryland, USA

Correspondence to Gert U. van Zyl, Division of Medical Virology, Stellenbosch University, Cape Town, South Africa. Tel: +27 21 9389691; e-mail: [email protected]

Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's Website (www.co-hivandaids.com).