Cephalic vein dilatation at the elbow by preoperative supervised forearm exercise depends on adherence to therapy: Results from the randomized controlled single-blind PINCH trial. - Wilschut ED; de Winter EP; Bos EJ; de Vries MR; Putter H; van der Steenhoven TJ; Eefting D; Hamming JF; Rotmans JI; van der Bogt KEA (The journal of vascular access, 2026)