Table 1. Past Medical History of the Included Patients.
| Past history | No. (%) |
|---|---|
| Surgery | 16 (22) |
| Trauma non-airway | 10 (13.6) |
| Hypertension | 6 (8.2) |
| Reflux | 3 (4) |
| Diabetes | 2 (2.2) |
| COPD | 2 (2.2) |
| TB | 1 (1.2) |
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