| Study | Reason for exclusion |
|---|---|
| ACTRN12617000300370 | Study withdrawn/terminated prematurely |
| Brady 2016 | Ineligible intervention |
| De la Fuente 2018 | Ineligible intervention |
| De Vibe 2013 | Ineligible intervention |
| Duan 2019 | Ineligible intervention |
| Dvořáková 2017 | Ineligible intervention |
| Esch 2013 | Ineligible intervention |
| Huennekens 2018 | Ineligible intervention |
| Pogrebtsova 2018 | Ineligible intervention |
| Sampl 2017 | Ineligible intervention |
| Song 2015 | Ineligible intervention |
| Van Dijk 2015 | Ineligible intervention |
| Victor 2017 | Ineligible study design |
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