Role of chronic infection and inflammation in the gastrointestinal tract in the etiology and pathogenesis of idiopathic parkinsonism. Part 2: response of facets of clinical idiopathic parkinsonism to Helicobacter pylori eradication. A randomized, double-blind, placebo-controlled efficacy study [corrected in Helicobacter 2005;10(5):557] - Bjarnason, I T; Charlett, A; Dobbs, R J (Helicobacter, 2005)