Table 1.

Summary of epidemiological investigations on microcystins and liver disease.

Authors	Country	Design	Environmental toxin	Finding
Ueno et al. (23)	China	Epidemiological survey	Microcystin	MC detection in drinking water sources correlates with a high PLC incidence
Fleming et al. (25)	USA	Pilot ecological study	Microcystin	Residential proximity to surface water drinking sources increases HCC risk
Chen et al. (75)	China	Longitudinal study	Microcystin	Concurrent detection of serum MCs and liver enzymes indicate hepatocellular damage in fishermen
Svirčev et al. (24)	Serbia	Descriptive epidemiological method	Microcystin	Significant and persistent blooms correlate with PLC mortality and incidence
Zheng et al. (26)	China	Case-control study	Microcystin	Serum MC detection in patients link to HCC risk