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Tangkijvanich P, Mahachai V, Wittayalertpanya S, Ariyawongsopon V, Isarasena S.Tangkijvanich P, et al. Among authors: wittayalertpanya s.Southeast Asian J Trop Med Public Health. 2000 Mar;31(1):152-7.Southeast Asian J Trop Med Public Health. 2000.PMID: 11023085Clinical Trial.