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Footnotes
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Contributors PHD, GRN, AJW and AS contributed to the design and concept of the study. PHD and AS generated the primary data. GRN and AJW provided the measurements of interleukin-6 and endothelial activation molecule concentrations. PHD performed the data analysis and interpretation and wrote the manuscript in cooperation with GRN and AJW.
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Funding The South African Medical Research Council (grant MRC2008_DES) funded the testing kits for determination of interleukin-6 and endothelial activation molecule concentrations.
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Competing interests None.
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Patient consent Obtained.
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Ethics approval The Witwatersrand University Ethics Committee (Human Subjects).
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Provenance and peer review Not commissioned; externally peer reviewed.