Here's an article about Dr. Jack Jacoby - CF doctor with cf.
http://www.people.com/people/archive/article/0,,20118813,00.html
Jack has passed on.
He has a brother Jeff who was a cf floor nurse at some point. Not sure on his status now though.
The Jacoby's started a foundation and I'm sure they would be willing to speak to you about their thoughts on 2 of the their 3 children choosing medicine. By the way, their third child Jamie died from cf complications when she was 9.