A joint statement from the Neurointerventional Societies: our position on operator experience and training for stroke thrombectomy. (31st May 2019) - Linfante, Italo; Nogueira, Raul G; Zaidat, Osama O; Arthur, Adam S; Klucznik, Richard P; Mack, William J; Welch, Babu G; Siddiqui, Adnan H; Mocco, J