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Item Effect of repeated mass chemotherapy for filariasis control on soil-transmitted helminth infections in Sri Lanka(Sri Lanka Medical Association. Colombo, 2008) Gunawardena, N.K.; Amarasekera, N.D.D.A.; Pathmeswaran, A.; De Silva, N.R.Item Intestinal worms. our turn to turn(Sri Lanka Medical Association:Colombo, 1995) De Silva, H.J.; De Silva, N.R.Item Effect of repeated mass chemotherapy for filariasis control on soil-transmitted helminth infections in Sri Lanka(Sri Lanka Medical Association:Colombo, 2008) Gunawardena, N.K.; Amarasekera, N.D.D.A.; Pathmeswaran, A.; De Silva, N.R.