Classification of congenital scoliosis and kyphosis: a new approach to the three-dimensional classification for progressive vertebral anomalies requiring operative treatment. - Kawakami N; Tsuji T; Imagama S; Lenke LG; Puno RM; Kuklo TR; Spinal Deformity Study Group; Kawakami, Noriaki; Tsuji, Taichi; Imagama, Shiro; Lenke, Lawrence G; Puno, Rolando M; et al. (Spine (03622436), 2009)