1. Studies meeting selection criteria but excluded from the meta‐analysis.

Study	methods	Remission 1 month	Remission 6 months	Remission 12 months	Mean LOS pressure	Complications
Annese 1996	8 participants 100 U BTX and 8 participants PD PD: day 1 ‐ Rigiflex 30 mm. Day 2 and 3 ‐ 35 mm balloon BTX relapsers retreated	PD 8/8 BTX 8/8	PD 8/8 BTX 6/8	PD 8/8 BTX 1/8	PD ‐72% BTX ‐44%	none
Muehldorfer 1999	12 participants 80 U BTX and 12 PD 40m day 1 and 3 BTX repeated at 1 week in 4 non‐responders	PD 10/12 BTX 9/12	PD 9/12 BTX 6/12	PD 8/12 BTX 3/12	PD ‐50% BTX ‐44%	none