Something I forgot to say: my mother always thought that as long as her lungs showed no tumors (i.e., she didn't have lung cancer), she was fine. In her later years, she said, "No one ever talked about emphysema and how bad it is."

Well, it's bad. She lived with us the last 5-1/2 years of her life, and it's bad. One good thing: living with her guaranteed, I think, that my kids will never smoke.