Johan Conradie

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PURPOSE To design a simple, cost-effective system for gaining rapid and accurate calyceal access during percutaneous nephrolithotomy (PCNL). MATERIALS AND METHODS The design consists of a low-cost, light-weight, portable mechanical gantry with a needle guiding device. Using C-arm fluoroscopy, two images of the contrast-filled renal collecting system are(More)
Bao, an African board game of the Mancala family, is a complex two-player game with a very large search space and complex rule set. The success of game tree approaches to create game-playing agents rests heavily on the usually handcrafted, static evaluation function. One of the first steps towards using a game tree is to design an appropriate, efficient(More)
The right and left nares of healthy adults (n = 251) were swabbed separately to determine carriage of Staphylococcus aureus in each nostril. Carriers were significantly more likely to carry S. aureus in one nostril than in both. Of those carrying S. aureus in both nostrils, 20% carried genetically distinct strains in each. Nostrils belonging to a single(More)
OBJECTIVE To quantify intraindividual variability of antimüllerian hormone (AMH) as analytical and biological coefficients of variation and assess the effects of variation on clinical classification. DESIGN Retrospective cohort study. SETTING Not applicable. PATIENT(S) Thirty-eight women referred by general practitioners. INTERVENTION(S) None. (More)
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