A Prospective, Randomized, Controlled Trial Comparing the Results of Microdiscectomy Under Regional and General Anesthesia -- Nucleoplasty as an Alternative Intradiscal Therapy: Indications and Technique -- Surgical Procedures and Clinical Results of Endoscopic Decompression for Lumbar Canal Stenosis -- Videotape-Assisted Thoracoscopy (VAT) for Anterior Release in Neuromuscular Scoliosis -- Cli…