L5 is a reliable lower instrumented vertebra (LIV) in selected adult spinal deformity (ASD) patients - S. Núñez-Pereira; Y.P. Charles; S. Haddad; A. Pupak; J. Pizones; A. Alanay; I. Obeid; F. Kleinstück; F. Pellisé (Brain and Spine)