Mismatch repair deficiency and MUTYH variants in small intestine-neuroendocrine tumors. - Helderman NC; Elsayed FA; van Wezel T; Terlouw D; Langers AMJ; van Egmond D; Kilinç G; Hristova H; Farina Sarasqueta A; Morreau H; Nielsen M; Suerink M (Human pathology, 2022)