List six advantages of treating vasoocclusive disease with PTA.

1. Minimally invasive
2. High initial success rate
3. Does not distort anatomy in case surgical bypass becomes necessary
4. Patency rates in properly selected patients approach those of surgical bypass
5. Low rate of complications requiring additional surgery (3%, same as for surgical bypass)
6. Low mortality rate (<1%, as opposed to 1%-4% with surgical bypass)