Barry Marshall's announcement that the medical world were completely wrong about the cause of peptic ulcers was not a popular one with his colleagues.
For years they believed that ulcers are caused by stress and treated them with drugs that reduced stomach acid - or surgery. Marshall found that it was the bacterium Helicobacter pylori that caused ulcers, treatable with antibiotics. But drug companies have been slow to acknowledge this discovery.
Ulcer Wars shows how hard it is to promote research which threatens established beliefs and lacks commercial backing. It also explores evidence that Helicobacter is a cause of stomach cancer, and features a man whose stomach cancer was cured by antibiotics alone.
Meet the doctor who discovered a cure for ulcers
See Feature page 38