1. Reported adverse events.

Study ID	Adverse events
Gunawansa 2011	Two patients in the late group required re‐stenting due to ureteric stenosis
Huang 2012	Three patients in the late group had forgotten stents that were subsequently removed at 12 weeks
Indu 2012	Six patients in the early and 5 patients in the late group had acute rejection that required intervention
Parapiboon 2012	No adverse events reported
TrUST 2017	Sixteen patients did not receive their allocated treatment as there were technical difficulties attaching the stent to the catheter. In the early removal group, 1 patient's stent removal was delayed by 1 day because the urethral catheter balloon needed percutaneous needle puncture due to the stent suture There were 5 complications in patients who had early stent removal and these were all related to the percutaneous technique used in which the stent was tied to the catheter