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PharmacoEconomics, (2002).20 1 10.2165/00019053-200220010-00001.
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Drugs, (2002).62 10 10.2165/00003495-200262100-00002.
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Lancet, (2002).360 9339 10.1016/S0140-6736(02)11141-X.
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The Pediatric infectious disease journal, (2002).21 10 10.1097/00006454-200210000-00011.