Table 1. The basic characteristics of included studies.
| Study | Year of publication | Country | Duration | Study design | Patient, n | Age (years) | Gender (M:F) | Follow-up (months) |
|---|---|---|---|---|---|---|---|---|
| Meireles et al.7) | 2013 | United States | Jan 2010–Dec 2010 | Retrospective | 5 | 42.4 | – | – |
| Ling et al.8) | 2014 | China | Sept 2010–Jun 2012 | Prospective | 87 | 41.6 ± 15.6 | 40:47 | 1.2 ± 0.3 |
| Orenstein et al.9) | 2015 | United States | May 2011–Sept 2013 | Retrospective | 40 | – | – | 10 |
| Li et al.10) | 2015 | China | Nov 2011–Aug 2014 | Prospective | 15 | 67 (65–84) | 6:9 | 18 (6–39) |
| Liu et al.11) | 2015 | China | May 2013–Dec 2013 | Retrospective | 35 | 40.2 (15–63) | 11:24 | 11.4 (6–15) |
| Vigneswaran et al.12) | 2016 | United States | Aug 2011 | Prospective | 37 | 64 ± 18 | 24:13 | 6.97 |
| Hoppo et al.13) | 2016 | United States | Jan 2013–Oct 2014 | Retrospective | 25 | 56.9 (23–86) | – | 7 (0.5–17) |
| Jones et al.14) | 2016 | United States | Aug 2012–Jun 2014 | Prospective | 43 | 53.5 ± 17.4 | 27:16 | 6 |
| Hernández Mondragón et al.15) | 2017 | Mexico | Feb 2012–Nov 2016 | Retrospective | 65 | 47 (20–81) | 27:38 | at least 12 |
| Peng et al.16) | 2017 | China | 2011–2016 | Retrospective | 13 | 37.5 ± 13.0 | 8:5 | 46.2 ± 4.1 |
| Ward et al.17) | 2017 | United States | 2011–2016 | Prospective | 41 | 63.0 ± 17.9 | 25:16 | at least 12 |
| Perbtani et al.18) | 2018 | United States | Mar 2013–Oct 2016 | Prospective | 143 | 58 ± 18 | 77:66 | 16.4 (12–40) |
M:F: male to female; NA: not available