Answer to the letter to the editor of M. Zhang, et al. concerning “comparison of the efficacy of arthroscopic-assisted uni-portal spinal surgery and percutaneous endoscopic lumbar discectomy in the treatment of far lateral lumbar disc herniation: a retrospective controlled study” by J. Li et al. (Eur spine J [2025]: doi: 10.1007/s00586-025-08998-4)