[1] Hop Henri Mondor, Serv Neurochirurg, F-94000 Creteil, France
[2] Hop Neurol, Serv Neurochirurg, Lyon, France
[3] CHU Nancy, Serv Neurochirurg, Nancy, France
[4] HIA Val de Grace Percy, Serv Neurochirurg, Paris, France
[5] CHU Rennes, Serv Neurochirurg, Rennes, France
[6] CHU Clermont Ferrand, Serv Neurochirurg, Clermont Ferrand, France
[7] CHU Bordeaux, Serv Neurochirurg, Bordeaux, France
[8] Hop St Anne, Serv Neurochirurg, F-75674 Paris, France
[9] CHU Nice, Serv Neurochirurg, Nice, France
[10] CHU Nimes, Serv Neurochirurg, Nimes, France
[11] CHU Montpellier, Serv Neurochirurg, Montpellier, France
[12] UZ Bruxelles, Serv Neurochirurg, Brussels, Belgium
[13] Free Univ Brussels, Hop Erasme, Serv Neurochirurg, B-1070 Brussels, Belgium
[14] CHU Angers, Serv Neurochirurg, Angers, France
[15] Ctr Hosp Groningen, Serv Neurochirurg, Groningen, Pays Bas, Netherlands
[16] CHU St Etienne, Serv Neurochirurg, St Etienne, France
[17] CHU Reims, Serv Neurochirurg, Reims, France
[18] Hop Lariboisiere, Serv Neurochirurg, F-75010 Paris, France
[19] CHU Orleans, Serv Neurochirurg, Orleans, France
[20] Ctr Hosp Gent, Serv Neurochirurg, Ghent, Belgium