Just wanted to add that as a working musician, my first occupational hazard which has kept me out of the clubs and directly interfered with my livelihood is the poison of tobacco smoke.
Reading the autobiography of many famous songwriters I'm impressed that their life span
seems to be cut short of the their fiftieth birthdays. Irving Berlin, the only exception, seemed to defy the odds.

Why do you think that was? From what I've read, just two words. Tobacco and alcohol.