| Signs | Number of cases | Percentage |
| Palpitations | 18 | 62.1% |
| Weight loss | 13 | 44.8% |
| Insomnia | 12 | 41.4% |
| Tremor | 9 | 31% |
| Exophthalmos | 8 | 27.6% |
| Nervousness | 7 | 24.1% |
| Diarrhea | 5 | 17.2% |
| Anorexia | 1 | 3.4% |
| Neck pain | 1 | 3.4% |
| Dysphagia | 1 | 3.4% |
| General fatigue | 1 | 3.4% |
| Weight gain | 1 | 3.4% |