Answer to the letter to the editor of Z. Feng, et al. concerning “How much does an MRI change over a period of up to 2 years in patients with chronic low back pain? Is a repeated MRI really necessary in the follow-up of patients with chronic low back pain?” by Tomé-Bermejo F, et al. (Eur spine J [2024]; https://doi.org/10.1007/s00586-024-08416-1)