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About Us; Advisory Board

Directors Management Advisory Board

Simcha J. Weller, M.D.

Simcha J. Weller, MD, Assistant Professor of Neurosurgery at Boston Institute of Neurosurgery at Tufts-New England Medical Center, began an excellent diversity of educational credentials and surgical expertise in neurosurgery by first receiving his B.A. degree at Yeshiva University, New York, NY (Biology, Summa Cum Laude). He earned his medical degree from University of Pennsylvania School of Medicine, Philadelphia, PA, completing both his internship and residency from Brigham & Women's Hospital, Boston, M.A.; Department of General Surgery. Dr. Weller continued his medical career under the direction of Edward Benzel, M.D. at the Clinical Fellowship in Complex and Reconstructive Spinal Surgery, at University of New Mexico, Albuquerque, NM, Division of Neurosurgery.

Dr. Weller has held other highly esteemed academic positions, such as Clinical Instructor, Department of Surgery (Division of Neurosurgery) University of New Mexico (1996-97) and Instructor in Surgery at Harvard Medical School (1997-2005). Dr. Weller¿s special interests include Complex and Reconstructive Spine Surgery, Spinal Microsurgery, Surgical Treatment of Cervical Spondylotic Myeloradiculopathy, Spine Tumors, and Spine Trauma.


John Sledge, M.D.

Dr. Sledge earned his BA degree from Wesleyan University in Connecticut. He went on to earn his MD from the University of Rochester in New York. He completed his residency in orthopedics at Harvard University as well as becoming Chief Resident of Orthopedics at Brigham & Women’s Hospital in Boston. He earned the Maurice Muller Fellowship in Orthopedics (foreign study in Europe).

Dr. Sledge’s background is strongly rooted in an academic setting accepting positions as Director of Orthopedic Trauma Service at Brigham & Women’s Hospital, Assistant Professor of Orthopedics at Boston University School of Medicine, and Clinical Associate in Orthopedics at Massachusetts General Hospital in Boston. Dr. Sledge has authored 15 articles and abstracts, 18 presentations, as well as conducting current clinical research related to spinal injuries. He currently has an active orthopedic clinical practice in Massachusetts.


Mick Perez-Cruet, M.D., M.Sc.

Dr. Perez-Cruet is the Director of Minimally Invasive Spinal Surgery at Rush-Presbyterian St. Luke’s Medical Center in Chicago. Dr. Perez-Cruet received his MS in Chemistry from University of South Florida. He went on to earn his MD from Tuft’s University in Boston. He completed a fellowship in minimally invasive spinal surgery at Rush University in Chicago under Richard Fessler, MD.

Dr. Perez-Cruet currently holds an academic position as Assistant Professor at Rush-Presbyterian St. Luke’s Medial Center Chicago/Institute of Neurosurgery and Neuroresearch in Chicago, Illinois. Dr. Perez-Cruet has authored a textbook on outpatient spinal surgery. Moreover, he has authored over 30 articles and abstracts and has made 19 presentations at medical meetings across the country.

Dr. Perez-Cruet is currently the principal investigator in several clinical research studies on a wide variety of aspects of spinal surgery.



Ziya L. Gokaslan, MD, F.A.C.S., Director.

Ziya Gokaslan, MD, has been a board certified neurological surgeon for 22 years. Dr. Gokaslan received his Doctorate of Medicine from University of Istanbul. He went on to pursue post-graduate work at New York University, New York and Baylor College of Medicine in Houston, Texas. Dr. Gokaslan has received academic appointments which include: Clinical Assistant Professor of Neurosurgery at Baylor College of Medicine, Assistant Professor of Neurosurgery at University of Texas MD Anderson Cancer Center, and most recently, Professor of Neurosurgery at Johns Hopkins University School of Medicine. In addition, Dr. Gokaslan currently serves as Vice-Chairman in the Department of Neurosurgery, Neurosurgical Spine Program at Johns Hopkins University School of Medicine in Baltimore, Maryland. Dr. Gokaslan has extensive publications, abstracts, lectures, exhibitions, presentations and book chapters to his credit covering a range of spine topics. He has also managed a fellowship program for over a decade. Dr. Gokaslan was appointed program co-chairman of the North American Spine Society in 2004.

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