[1] Weill Cornell Med, New York Presbyterian Hosp, Weill Cornell Brain & Spine Ctr, Dept Neurol Surg, New York, NY USA
[2] Allama Iqbal Med Coll, Lahore, Pakistan
[3] Brandenburg Univ, Dessau Clin Ctr, Dessau Rosslau, Germany
[4] Neurosurg Clin, Dept Neurosurg, Birgunj, Nepal