From the aDivision of Internal Medicine, University Hospital Basel, University of Basel, Basel, Switzerland
bRed Cross War Memorial Children’s Hospital, Cape Town, South Africa
cCentre for Infectious Disease Epidemiology and Research, University of Cape Town, Cape Town, South Africa.
Submitted December 6, 2017; accepted July 26, 2018.
Supported by the US National Institute of Allergy and Infectious Diseases through the International epidemiological Databases to Evaluate AIDS, Southern Africa (IeDEA-SA), grant 5U01AI069924-05.
The authors report no conflicts of interest.
Availability of code and data: The R-code for this analysis is part of the supplementary material; https://links.lww.com/EDE/B389. The data are available from the authors upon request to verify the results.
Supplemental digital content is available through direct URL citations in the HTML and PDF versions of this article (www.epidem.com).
Correspondence: Michael Schomaker, Centre for Infectious Disease Epidemiology and Research, University of Cape Town, Anzio Road, Observatory 7925, Cape Town, South Africa. E-mail: [email protected].