For Laree Wools, there’s nothing worse than watching her son, Marcus, struggle to breathe. Marcus, 6, has cystic fibrosis, a genetic disorder that complicates breathing and digestion. Marcus was diagnosed at age 3; a newborn…

Dear Dr. Roach: I’m a 79-year-old man in generally good health. What is not under control is the lower back pain I have been suffering due to disk deterioration. I have been able to control…