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Transactions of the Royal Society of Tropical Medicine and Hygiene > 1999 > 93 > 2 > 137-141
Transactions of the Royal Society of Tropical Medicine and Hygiene > 1997 > 91 > 6 > 701-703
Transactions of the Royal Society of Tropical Medicine and Hygiene > 1999 > 93 > 2 > 137-141
Transactions of the Royal Society of Tropical Medicine and Hygiene > 1997 > 91 > 6 > 701-703