STATE OF NATIONAL AND ESO CERTIFICATIONS FOR STROKE CENTRES/UNITS AMONG ESO MEMBERS - Waje-Andreassen, U; Bar, M; Cappellari, M; Carneado-Ruiz, J; Derex, L; Dippel, D W; Engelter, S; Jenkinson, D; Nabavi, D G; Orken, D N (International Journal of Stroke, 2020)