Changes in patterns of HIV prevalence in urban Kenya, Zimbabwe, and urban Haiti are quite recent and caution is required because of doubts over the accuracy and representativeness of these estimates. Nonetheless, the observed changes are consistent with behaviour change and not the natural course of the HIV epidemic.

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Low serum creatinine levels are associated with VENI, suggesting that swiftness of the efficacy of rt-PA or of neurological recovery may depend on renal function.