Kapritsou, M. Korkolis, D. Giannakopoulou, M. Katsoulas, T. Bastaki, M. Konstantinou, E., Factors Affecting Stress Levels in Hospitalized Patients after Implementation of Fast.track Protocol in Hepatopancreatobiliary Surgery, Asia-Pacific Journal of Oncology Nursing, (7), 44-48, 2020, Wolters Kluwer--Medknow Publications,