TABLE 2.
Assessment of the quality of the studies included in the review.
| Article | Controlled to healthy subjects | Absence of neurological or psychiatric history | Absence of active central nervous system condition | Absence of active psychiatric condition | Effect of medication controlled | Diagnosis confirmed by a neurologist and/or a psychiatrist | Sufficient details for replication | Sample size | Overall score |
| Kitamura et al. (23) | yes | yes | yes | yes | yes | yes | yes | 1 | 8/10 |
| Tramoni et al. (30) | yes | yes | yes | yes | no | yes | yes | 1 | 7/10 |
| Hennig-Fast et al. (22) | yes | no | yes | yes | yes | yes | yes | 1 | 7/10 |
| Chechko et al. (20) | yes | no | yes | yes | no | yes | yes | 1 | 6/10 |
| Thomas-Anterion et al. (29) | yes | no | yes | yes | no | yes | yes | 2 | 6/10 |
| Kikuchi et al. (35) | no | no | yes | yes | yes | yes | yes | 2 | 6/10 |
| Sellal et al. (37) | no | yes | yes | yes | yes | yes | no | 1 | 6/10 |
| Markowitsch et al. (26) (Cogn. Neuropsy.) | yes | yes | yes | no | no | yes | yes | 1 | 6/10 |
| Magnin et al. (25) | no | yes | yes | no | yes | yes | no | 1 | 5/10 |
| Arzy et al. (32) | yes | no | yes | yes | no | yes | no | 1 | 5/10 |
| Helmes et al. (34) | no | yes | yes | no | no | yes | no | 1 | 4/10 |
| Kunii et al. (24) | no | no | yes | yes | no | yes | no | 1 | 4/10 |
| Thomas-Anterion et al. (28) | yes | no | yes | no | no | yes | no | 1 | 4/10 |
| Brand et al. (18) | yes | no | no | no | no | yes | no | 14 | 4/10 |
| Stracciari et al. (38) | no | no | yes | no | no | yes | no | 13 | 4/10 |
| Botzung et al. (33) | no | yes | no | no | no | yes | yes | 1 | 4/10 |
| Piolino et al. (27) | yes | no | no | no | no | yes | yes | 1 | 4/10 |
| Yang et al. (39) | no | no | yes | no | no | yes | yes | 1 | 4/10 |
| Glisky et al. (21) | yes | no | no | no | no | yes | yes | 1 | 4/10 |
| Yasuno et al. (31) | yes | no | no | no | no | yes | yes | 1 | 4/10 |
| Markowitsch et al. (26) (Psychiatry Res.) | no | no | yes | no | no | yes | yes | 1 | 4/10 |
| Mitsui et al. (40) | no | no | yes | no | no | yes | no | 1 | 3/10 |
22 studies were included on the review. In this table, studies are displayed using first their overall quality and their publication date. Each one was assessed on a ten-point scale, 1 being of very low quality and 10 being of very high quality. Every positive answer to one of our criteria added one point. Studies with 15 patients or more were rewarded 3 points; the ones between 5 and 14 included gave 2 points, and studies with less than 5 patients were only given 1 point.