Study	Reason for exclusion
Al‐Tuwairqi 2017	Wrong comparison intervention
Birnbaum 2011	Wrong patient population
Carrasquillo 2007	Wrong patient population
Coskunseven 2009	Wrong study design
Elsaftawy 2015	Wrong comparison intervention
Ertan 2006	Wrong comparison intervention
Ganesh 2013	Wrong comparison intervention
Greenstein 2014	Wrong comparison intervention
Hashemi 2014	Wrong patient population
Hashemian 2014	Wrong comparison intervention
Hosny 2015	Wrong comparison intervention
IRCT2014022516738N1	Wrong comparison intervention
Jabbarvand 2014	Wrong comparison intervention
Kubaloglu 2010a	Wrong comparison intervention
Kubaloglu 2010b	Wrong comparison intervention
Mulet 2010	Wrong intervention
NCT01869517	Wrong comparison intervention
Ossma‐Gomez 2006	Wrong intervention
Sousa 2006	Wrong study design