Answer to the Letter to the Editor of D. Liao, et al. concerning "Do postoperative changes in physical function affect patient-reported outcomes in patients with lumbar spinal stenosis undergoing rehabilitation? A secondary analysis of a randomized controlled trial" by M. Minetama, et al. (Eur Spine J [2025]; doi: 10.1007/s00586-025-09302-0). — SciRadar