Consensus document on electroencephalography education in anaesthesiology: defining learning outcomes - a modified four-round Delphi study / Joana Berger-Estilita, Dana Baron Shahaf, Odmara L. Barreto Chang, Vincent Bonhomme, Iulia Crisan, Juan L. Fernández-Candil, Paul S. Garcia, Mia Gisselbaek, Bryan A. Glezerson, Darren Hight, Karina Jakobsen, Ivan Jonassen Rimstad, Heiko A. Kaiser, Stephan Kratzer, Susanne Koch, Ozlem Korkmaz Dilmen, Matthias Kreuzer, Janna Helfrich, Friedrich Lersch, Francisco A. Lobo, Adrian P. Marty, Isabel Marcolino, Başak C. Meco, Ben Palanca, Stefanie Pilge, Finn M. Radtke, Frank Rasulo, Aeyal Raz, Stefano Romagnoli, Carolina S. Romero, Gerhard Schneider, Pablo O. Sepúlveda, Daniel Shmukler, Barbara Sinner, Martin Soehle, Felipe S. Thyrso de Lara, Susana Vacas, Sérgio Vide, Falk von Dincklage, Sarah Saxena, Anthony R. Absalom