Presence of HCV-RNA after ultracentrifugation of serum samples during the follow-up of chronic hepatitis C patients with a sustained virological response may predict reactivation of hepatitis C virus infection

Castillo I, Bartolomé J, Quiroga JA, Barril G, Carreño V. Aliment Pharmacol Ther. 2009 Sep 1;30(5):477-86