What did the man undergo?

W: Did you get the results of your company physical exam?
M: Yes, all the numbers from the blood test are in the healthy range, and the X-rays showed nothing unusual.
W: I told you that giving up cigarettes would be good for you. Big sisters are always right.
M: Well, I didn’t like being bossed around by you when we were little, but it paid off to listen to you this time.