Table 1. Nanjing criteria for the diagnosis of PA-HSOS.

No.	Diagnostic criteria
i	A definite history of PA-containing plants
ii	Abdominal distention and/or pain in the hepatic region, hepatomegaly and ascites
iii	Elevation of serum TBil or abnormal liver function
iv	Typical features in the enhanced CT or MRI

Patients with i, ii, iii, iv or i, and pathological evidence, and the ruling out the other known causes of liver injury can be diagnosed as PA-HSOS.