Study	Reason for exclusion
Cheungpasitporn 2016a	Not RCT
Cheungpasitporn 2016b	Wrong comparator
de La Guéronnière 2011	Intervention given for only 6 days
Ferraro 2017	Not RCT
Fink 2013	Not RCT
Khan 2015	Wrong comparator
Lotan 2013	Not RCT
Lotan 2016	Not RCT
Maughan 2016	Wrong comparator
Prasetyo 2013	Not RCT
Sarica 2006	Participants were randomised prior to SWL; only a subset of participants who were determined stone‐free were then followed, thereby addressing a different question. Participants followed may not have been comparable at baseline.
Ticinesi 2015	Not RCT
Tsang 2012	Wrong comparator
Wang 2013	Not RCT

RCT: randomised controlled trial
 SWL: shock wave lithotripsy