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Reported response rates of included studies.
| Reference | Study ID | Response rate, % | Participated/Reached |
| [17] | Lord, 2011 | 26.67 | 689/2583 |
| [19] | Cucchetti, 2012 | 22.80 | 2414/10584 |
| [16] | Lohse, 2013 | 17.42 | 18/465 |
| [14] | Woolley, 2012 | 11.19 | 90/804 |
| [15] | Ramo, 2012 | 10.69 | 1548/14808 |
| [12] | Fenner, 2012 | 6.93 | 551/7940 |
| [11] | Levine, 2011 | 2.17(synchronous) | 16/738 |
| 7.20 (asynchronous) | 18/250 |
