Alternative Lengthening of Telomeres and Differential Expression of Endocrine Transcription Factors Distinguish Metastatic and Non-metastatic Insulinomas. - Hackeng WM; Schelhaas W; Morsink FHM; Heidsma CM; van Eeden S; Valk GD; Vriens MR; Heaphy CM; Nieveen van Dijkum EJM; Offerhaus GJA; Dreijerink KMA; Brosens LAA (Endocrine pathology, 2020)