| Name study | Randomization | Blindness | Dropouts | Jaded scores |
| Boulenger 2014 | 1 | 2 | 1 | 4 |
| Jacobsen 2013 | 1 | 2 | 1 | 4 |
| Mahableshwarkar 2013 | 1 | 2 | 1 | 4 |
| Trial NCT01255787 2104 | 1 | 2 | 1 | 4 |