Alternative lengthening of telomeres in pancreatic neuroendocrine tumors is associated with more aggressive clinicopathologic features and increased risk of recurrence. (2021) - Gudmundsdottir, H.; Graham, R.P.; Smoot, R.L.; Truty, M.J.; Kendrick, M.L.; Halfdanarson, T.R.; Cleary, S.P.