?:authorAffiliation
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[\'Department of Spine Surgery, Zentralklinik Bad Berka, Robert-Koch-Allee 9, 99437, Bad Berka, Germany. hashmf1@yahoo.com.\', \'Department of Orthopedic Surgery, Alexandria University, Alexandria, Egypt. hashmf1@yahoo.com.\', \'Department of Anesthesia and Intensive Care, Alexandria University, Alexandria, Egypt.\', \'Department of Spine Surgery, Zentralklinik Bad Berka, Robert-Koch-Allee 9, 99437, Bad Berka, Germany.\', \'Department of Orthopedic Surgery, Alexandria University, Alexandria, Egypt.\']
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