The Cochrane database of systematic reviewsReferencesReferences to studies included in this reviewde Lange de Klerk 1994 {published data only}0959‐8318PMC2541873Furuta 2017 {published data only}Jacobs 2001 {published and unpublished data}11224838Jacobs 2016 {published data only}Malapane 2014 {published data only}Nierderle 2001 {published data only}Pedrero‐Escalas 2016 {published data only}Sinha 2012 {published data only (unpublished sought but not used)}10.1016/j.homp.2011.08.003Siqueira 2016 {published data only}Steinsbekk 2005a {published data only (unpublished sought but not used)}10.1111/j.1365-2125.2005.02336.xVoss 2018 {published data only}References to studies excluded from this reviewAllaert 2018 {published data only}Antonello 2012 {published data only}Attena 1995 {published data only}Beghi 2016 {published data only}CTRI/2014/06/004673 {published data only (unpublished sought but not used)}CTRI/2014/12/005294 {unpublished data only}D'Souza 2012 {published data only}Ferley 1987 {published data only}Frei 2001 {published data only}Friese 2001 {published data only}Harrison 1999 {published data only}Jong 2016 {published data only}Klement 2018 {published and unpublished data}Lasfargues 1983 {published data only}Mathie 2020 {published data only}Meskina 2019 {published data only}NCT00858494 {unpublished data only}Palm 2017 {published and unpublished data}10.1016/j.ctcp.2017.05.005Panahi 2016 {published data only}10.3109/19390211.2014.952865Popovych 2019 {published data only}10.1016/j.amjoto.2018.10.012.Rottey 1995 {published data only}Salami 2008 {published data only}Shamsheva 2020 {published data only}Steinsbekk 2005b {published data only}Steinsbekk 2007 {published data only}Talele 2022 {published data only}Taylor 2011 {published data only}Thinesse‐Mallwitz 2015 {published data only}Torbicka 1998 {published data only}Van Haselen 2016 {published data only}Zanasi 2014 {published data only}Additional referencesAltunc 2007Atkins 2004Bellavite 2011Chen 2011Clarke 2015Damania 2021eTG 2021Fahey 1998GBD 2015GRADEpro GDT [Computer program]Grimes 2012Higgins 2011Jonas 2003Karsch‐Völk 2014Lee‐Treweek 2006Lefebvre 2011Linde 1997Linde 1998Lüdtke 2008Marom 2016Mathie 2014Mathie 2017Nair 2013NCT01257503NHMRC 2015Optum 2013Rao 2007Review Manager 2020 [Computer program]Rosenfeld 2003Rutten 2008Schulte 1999Schulz 2010Shang 2005Simoes 2006Steinsbekk 2004Ullman 2010Walach 2005References to other published versions of this reviewBecker 2010Hawke 2018Mascarenhas 2011. 12