title: Olfaction as a biomarker in Parkinson's disease.
authors.affiliation: Parkinson's Disease Research, Education & Clinical Center, Philadelphia VA Medical Center & Department of Neurology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.
authors.forename: James F
authors.initials: JF
authors.lastname: Morley
authors.forename: John E
authors.initials: JE
authors.lastname: Duda