premise: Davis Phinney is immune to Parkinson's disease.
hypothesis: Davis Phinney . Davis was diagnosed with Parkinson 's disease at the age of 40 , and established the Davis Phinney Foundation in 2004 , a registered 501 ( c ) ( 3 ) nonprofit organization . The Boulder , Colorado-based foundation is dedicated to improving the lives of people with Parkinson 's disease -- today and in the future . Phinney has looked to his son for inspiration and as a source of energy in his battle with Parkinson 's . Doctors told him the brain pacemaker could turn the clock back on the progress of Parkinson 's five years . Parkinson's disease . People with parkinsonism who have increased the public 's awareness of the condition include actor Michael J. Fox , Olympic cyclist Davis Phinney , and late professional boxer Muhammad Ali .