Multicenter randomized clinical trial of endovascular treatment for acute ischemic stroke. The effect of periprocedural medication: acetylsalicylic acid, unfractionated heparin, bo... de réir Chalos, V, A van de Graaf, R, Roozenbeek, B, C G M van Es, A, M den Hertog, H, Staals, J, van Dijk, L, F M Jenniskens, S, J van Oostenbrugge, R, H van Zwam, W, B W E M Roos, Y, B L M Majoie, C, F Lingsma, H, van der Lugt, A, W J Dippel, D, MR CLEAN-MED investigators, Rothwell, P