| N | % |
Stroke | 1 | 1.92 |
Acute chest syndrome | 1 | 1.92 |
Recurrent infection | 19 | 36.5 |
Heart disease | 2 | 3.85 |
Chronic osteomyelitis | 3 | 3.85 |
Vesicular lithiasis | 1 | 1.92 |