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http://www.who.int/mediacentre/factsheets/fs115/en/
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. Accessed 10 July 2016.
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4. Sagin DD, Ismail G, Fui JNF, Jokk JJ. Schistosomiasis malayensis-like infection among the Penan and other interior tribes (Orang Ulu) in Upper Rejang River Basin, Sarawak, Malaysia. Southeast Asian J Trop Med Public Health. 2001;32(1):27–32.
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https://www.amazon.com/PARASITOLOGY-Protozoology-Helminthology-KChatterjee/dp/8123918100/ref=sr_1_1?amp;s=books&ie=UTF8&qid=1481347220&sr=1-1
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