Please choose the correct ending to complete the given sentence: Health: [header] How to prepare for back surgery [title] Learn about the procedure. [step] There are many different types of back surgeries. If your doctor suggests that you need an operation, take care to find out precisely what he recommends.

Ending1: [substeps] Be aware that back surgeries do not guarantee that you will be healthy if you end up with pneumonia or other illness. You also might not see a doctor's recommendations if you have tried several approaches. Ending2: You can also ask for a referral to a surgeon who specializes in that type of back surgery. [substeps] One of the most common types of back surgery is spinal fusion. Ending3: Some of the most common back surgeries include : [substeps] Cranial debridement surgery: a procedure where the frame of a mirror is removed, sometimes cortisone is inserted to taper off the area. This usually only takes place between the lens and the optic nerve. Ending4: These types of procedures can be dangerous to your life. An operation is often performed under general anesthesia, but surgery can also be done through neurosurgery.

Answer format: ending1/ending2/ending3/ending4