Dr. Martin Gehrchen (Copenhagen National Hospital, Copenhagen, Denmark)Dr. Peter Vajkoczy (Charité Universitätsmedizin Berlin, Berlin, Germany)Dr. Sebastien Charosky (Spine and Scoliosis Center, Polyclinique du Parc, Toulouse, France)Dr. John Hutchinson (Spire Bristol Hospital, Bristol, U. K.）Dr. Federico P. Girardi (Hospital for Special Surgery, NY, U. S. A.）

Dr. Martin Gehrchen (Copenhagen National Hospital, Copenhagen, Denmark)Dr. Peter Vajkoczy (Charité Universitätsmedizin Berlin, Berlin, Germany)Dr. Sebastien Charosky (Spine and Scoliosis Center, Polyclinique du Parc, Toulouse, France)Dr. John Hutchinson (Spire Bristol Hospital, Bristol, U. K.）Dr. Federico P. Girardi (Hospital for Special Surgery, NY, U. S. A.）