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| Group | Number | Average age | Gender | Clinical features | Number of patients with clinical symptoms |
|---|---|---|---|---|---|
| A | 16 | 56±10.0 | 7 males | – | – |
| B1 | 12 | 64±12.4 | 9 males | – | – |
| B2 | 14 | 61±10.1 | 8 males | Chest distress | 6 |
| Dizziness | 2 | ||||
| Chest distress and dizziness | 1 | ||||
| Palpitations | 1 | ||||
| Coronary disease | 4 |
