Fig. 1From: Repeated praziquantel treatment and Opisthorchis viverrini infection: a population-based cross-sectional study in northeast ThailandStudy area, including the 7 provinces Nong Khai (NK), Sakon Nakhon (SK), Bueng Kan (BK), Udon Thani (UD), Chaiyaphum (CP), Khon Kaen (KK), and Kalasin (KS)Back to article page