Indications of Proximal Thoracic Curve Fusion in Thoracic Adolescent Idiopathic Scoliosis – Recognition and Treatment of Double Thoracic Curve Pattern in Adolescent Idiopathic Scoliosis Treated with Segmental Instrumentation - Suk, S; Kim, W J; Lee, C S (Spine (Phila Pa 1976), 2000)