Answers to the Letters to the Editor of P. Lambert et al. and L. G. Czaplewski concerning “Prospective study using anterior approach did not show association between Modic 1 changes and low grade infection in lumbar spine” by Rigal J, Thelen T, Byrne F, Cogniet A, Boissière L, Aunoble S, Le Huec JC (Eur Spine J [2016]; 25(4):1000–5. doi:10.1007/s00586-016-4396-5)