WCN24-723 VALIDATION OF A CORE OUTCOME MEASURE FOR HEMODIALYSIS VASCULAR ACCESS FUNCTION: A MULTINATIONAL DIAGNOSTIC ACCURACY AND FEASIBILITY STUDY - Andrea Viecelli; Andrea Valks; Richard Baer; Roy Cherian; Allison Jaure; David Johnson; Charani Kiriwandeniya; Wen-J Liu; Charmaine Lok; Krishan Madhan; Bénédicte Sautenet; Maarten Snoeijs; et al. (Kidney International Reports)