Dave Coverly's Laughter is the Best Medicine takes no prisoners as he boldly crosses the lines of patient/doctor confidentiality to document the funny, often bizarre, and sometimes hilarious encounters a patient can have with a doctor. There's no denying that a good laugh is very good medicine for the soul, and it's with a keen eye that Coverly finds humor in everything -- from (un)routine office visits to inhospitable hospital stays.  For example, there's a doctor confessing to his patient, ''I'll be the first to admit, the results of your autopsy were very surprising,'' or a couple sitting with their newborn as an officer appears to say, ''I'm sorry, ma'am, but there was a mix-up at the hospital, and we think you brought home the wrong husband,'', or a surgeon explaining, ''We put a screw in your hip, and since you were under, we figured we'd just tighten the loose one in your head.''