Snowball in a blizzard

There is a wry saying among radiologists: finding a tumour in a mammogram is like finding a snowball in a blizzard. Covering everything from the efficacy of Prozac to the regular barrage of health advice by the media, Snowball in a Blizzard is filled with counter-intuitive revelations, and is a profound meditation on how medicine is subject to far more uncertainty than we commonly acknowledge.