Table 1. Suzuki’s histological criteria.

Grade	Congestion (%)	Vacuolization (%)	Necrosis (%)
0	None	None	None
1	Minimal [10]	Minimal [10]	Minimal [10]
2	Mild [11–30]	Mild [11–30]	Mild [11–30]
3	Moderate [31–60]	Moderate [31–60]	Moderate [31–60]
4	Severe [>60]	Severe [>60]	Severe [>60]