@Londinium
48/60 people i talked to have had some kind of Liver Stressor (=EBV, Extended periods of Stress, Medication such as Accutane, Finasteride, Cipro, etc)
EDIT : I forgot to add in the List Cholestatic incidents, Gallbladder stones/removal and Liver issues in close family members.
The rest have had problems since kids but with symptoms pointing to impaired Liver function.
Basically i would strongly suggest that you identify what kind of Medication you took even 2 years before ME. Check whether this Medication is considered hepatotoxic.
Many patients have Cirrhosis without even knowing it. A very close relative of mine was recently found to have Liver Fibrosis Stage 3 without any symptoms or elevated Liver enzymes.