Re-treatment of patients with chronic hepatitis C who do not respond to peginterferon-alpha2b: a randomized trial. - Jensen DM; Marcellin P; Freilich B; Andreone P; Di Bisceglie A; Brandao-Mello CE; Reddy KR; Craxi A; Martin AO; Teuber G; Messinger D; Thommes JA; et al. (Annals of Internal Medicine, 2009)