The Nobel prize in physiology or Medicine 2005 for their discovery of the bacterium Heficobacter pylori and its role in gastritis and peptic ulcer disease Barry J. Marshal 1. Robin warren ①1/2 of the prize ①1/2 of the prize Australia Australia NHMRC Helicobacter pylori Research Laboratory, QEII Perth, Australia Medical Centre: University of Western Australia Nedlands, Australia b,19512005年10月 b.19372005年10月