Reberšek, M.; Hribernik, N.; Marković, K.; Marković, S.; Uršič Valentinuzzi, K.; Čemažar, M.; Zuliani, T.; Milačič, R.; Ščančar, J. The Determination of Copper and Other Trace Elements in Serum Samples from Patients With Biliary Tract Cancers: Prospective Noninterventional Nonrandomized Clinical Study Protocol. Radiol Oncol 2024, 58, 300-310.