Hartman, Marthinus Jacobus; Kirberger, Robert M.; Tordiffe, Adrian Stephen Wolferstan; Boy, Sonja Catharina; Schoeman, Johan P.(BMJ Publishing Group, 2015-02)
Myburgh, Jan G.; Kirberger, Robert M.; Steyl, Johan Christian Abraham; Soley, John Thomson; Booyse, Dirk J.; Huchzermeyer, Fritz W.; Lowers, Russell H.; Guillette, Louis J.(OpenJournals Publishing, 2014-05-05)
Dalton, Desire L.; Linden, Birthe; Wimberger, Kirsten; Nupen, Lisa Jane; Tordiffe, Adrian Stephen Wolferstan; Taylor, Peter John; Madisha, M. Thabang; Kotze, Antoinette(Public Library of Science, 2015-03-23)
Morters, Michelle K.; McNabb, Suzanne; Horton, Daniel L.; Fooks, Anthony R.; Schoeman, Johan P.; Whay, Helen R.; Wood, James L.N.; Cleaveland, Sarah(BMJ Publishing Group, 2015-08)