Surgical treatment of "chin-on-pubis" deformity in a patient with ankylosing spondylitis: a case report of consecutive cervical, thoracic, and lumbar corrective osteotomies. - Kim KT; Lee SH; Son ES; Kwack YH; Chun YS; Lee JH; Kim, Ki-Tack; Lee, Sang-Hun; Son, Eun-Seok; Kwack, Yoon-Ho; Chun, Young-Soo; Lee, Jae-Hoon (Spine (03622436), 2012)