[1] Univ Sherbrooke, Div Neurosurg, Ctr Rech Ctr Hosp Univ Sherbrooke, Sherbrooke, PQ, Canada
[2] Baptist Hlth South Florida, Miami Canc Inst, Dept Radiat Oncol, Miami, FL USA
[3] Univ Toronto, Dept Radiat Oncol, Sunnybrook Hlth Sci Ctr, Toronto, ON, Canada
[4] Univ Calif Los Angeles, Dept Neurosurg, Los Angeles, CA USA
[5] Fdn IRCCS Ist Neurol Carlo Besta, Radiotherapy Unit, Dept Neurosurg, Milan, Italy
[6] Mayo Clin, Dept Neurol Surg, Rochester, MN USA
[7] Lausanne Univ Hosp, Dept Neurosurg, Lausanne, Switzerland
[8] Lausanne Univ Hosp, Gamma Knife Ctr, Lausanne, Switzerland
[9] Univ Calif San Francisco, Dept Radiat Oncol, San Francisco, CA USA
[10] Med Phys Ltd, Reading, Berks, England
[11] Cromwell Hosp, London, England
[12] Aix Marseille Univ, Funct & Stereotax Neurosurg Dept, Clin Neurosci Federat, La Timone Hosp, Marseille, France
[13] Aizawa Hosp, Aizawa Comprehens Canc Ctr, Div Radiat Oncol, Matsumoto, Nagano, Japan
[14] Cleveland Clin, Dept Radiat Oncol, Taussig Canc Inst, Cleveland, OH 44106 USA
[15] Univ Virginia, Dept Neurol Surg, Charlottesville, VA USA