Steve, your recovery from a serious episode is reward in itself, and just your sincere thank you is more than adequate acknowledgement. The perforated peptic ulcer illustrates how much stress you were under, it must have been massive. Although I ended up an academic my career was nursing, and altogether I put in over fifty years in hospitals in UK and Africa, eventually specialising in mental health, especially the most severe and long-lasting forms. After retiring (early) from my university post, I went back to the wards for another 19 years. Kept me strong and flexible, and out of serious trouble!
Believe me, any nurse will tell you that they get much more back from their patients than they are ever in a position to give. We see how wonderful humanity is, even when the burden of illness or suffering seems to heavy to bear, people still smile, show genuine concern for others "worse off than thermselves", and soldier on without complaint. It's a glorious calling, and I would never change my life in that respect, not for anything.
Anyway, stay optimistic and don't change a thing about yourself, you're an act that will never be repeated, Steve!