Age | Sex | Epigastric pain | First attack (n), as the first admission (group A) | Recurrent attack (n), as the first dmission (group B) | Recurrent attack (n), as the second admission. Patients from group A forming (C) |
21 - 68 | M = 4 | All | 4 | 3 | 3 |
| F = 3 |
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