Optimal cut points for quality of life questionnaire-core 30 (QLQ-C30) scales: utility for clinical trials and updates of prognostic systems in advanced hepatocellular carcinoma. Diouf, M.; Bonnetain, F.; Barbare, J. C.; Bouche, O.; Dahan, L.; Paoletti, X.; Filleron, T.. Oncologist. 2015; 62-71: p.62-71. doi:10.1634/theoncologist.2014-0175 10.1634/theoncologist.2014-0175. Epub 2014 Dec 26.Article