{Reference Type}: Letter {Title}: A comment to "The relationship between stone-free and patient position in retrograde intrarenal surgery: a randomized prospective study". {Author}: Lu J;He R;Su L;YaLan Y;Wang Q;Chi H;Yang G; {Journal}: World J Urol {Volume}: 42 {Issue}: 1 {Year}: 2024 Jul 13 {Factor}: 3.661 {DOI}: 10.1007/s00345-024-05089-9