Association of Olfactory Dysfunction With Risk for Future Parkinsons DiseaseAnn Neurol 63:167-173,132, Ross,G.W.,et al, 2008
Idiopathic Hyposmia As a Preclinical Sign of Parkinson's DiseaseAnn Neurol 56:173-181,169, Ponsen,M.M.,et al, 2004