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| Comorbid condition | n | Symptoms/signs | n |
|---|---|---|---|
| Diabetes mellitus | 2 | Right upper quadrant pain | 8 |
| Hypertension | 5 | Epigastric pain | 4 |
| Asthma | 1 | Generalized abdominal pain | 2 |
| Paraplegia | 1 | Nausea/vomiting | 6 |
| Peripheral vascular disease | 1 | Fever | 3 |
| Coronary artery disease | 1 | Septic shock | 1 |
