Convince dad to quit

My dad had a heart attach and he is still smoking , even after Dr and me telling him he is not quitting.
I am a regular smoker too and i have redused my smoking and trying to quit. but i want to convince him to stop.

I for a similar question here
http://www.caring.com/questions/quit-smoking-after-heart-attac k

thought ill get advice from here and someone who has had a similar exp.

Any advice thank you,

Sara