- Correspondence to Dr Annalise E Zemlin, Division of Chemical Pathology, Faculty of Health Sciences, National Health Laboratory Service (NHLS) and University of Stellenbosch, P.O. Box 19113, Tygerberg, Cape Town 7505, South Africa;
- Received October 19, 2014
- Accepted November 10, 2014
- First published December 1, 2014.
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