| Study | Reason for exclusion |
|---|---|
| Aftanas 2019 | Wrong population |
| Barzman 2005 | Wrong intervention |
| Bondolfi 2000 | Comorbidity |
| Burger 2016 | wrong diagnostic criteria |
| Chen 2020 | Wrong design |
| Erdil 2015 | wrong diagnostic criteria |
| Giese 2014 | Comorbidity |
| Huey 2005 | Comorbidity |
| Irwin 2010 | Comorbidity |
| Liebrenz 2009 | Comorbidity |
| O'Gorman 2019 | Wrong design |
| Park 2020 | Wrong design |
| Rasmussen 2014 | Comorbidity |
| Rosenblat 2019 | Wrong design |
| Sharma 2020 | Wrong population |
| Shiroma 2020 | Wrong design |
| Zhang 2018 | Comorbidity |
| Zhong 2016 | Comorbidity |
RCT ‐ randomised controlled trial