"A0: no activity"
"A1: mild activity"
"A2: moderate activity"
"A3: severe activity"
"F0: no fibrosis"
"F1: portal fibrosis without septa"
"F2: portal fibrosis with few septa"
"F3: numerous septa without cirrhosis"
"F4: cirrhosis"
Expected headings
"Activity grade"
"Fibrosis stage"