Increased depressive ratings in patients with hepatitis C receiving interferon-alpha-based immunotherapy are related to interferon-alpha-induced changes in the serotonergic system. - Bonaccorso,S.; Marino,V.; Puzella,A.; Pasquini,M.; Biondi,M.; Artini,M.; Almerighi,C.; Verkerk,R.; Meltzer,H.; Maes,M. (J Clin Psychopharmacol, 2002)