Equating scores of the University of Pennsylvania Smell Identification Test and Sniffin' Sticks test in patients with Parkinson's disease

Michael Lawton (Corresponding Author), Michele T. M. Hu, Fahd Baig, Claudio Ruffmann, Eilidh Barron, Diane M. A. Swallow, Naveed Malek, Katherine A. Grosset, Nin Bajaj, Roger A. Barker, Nigel Williams, David J. Burn, Thomas Foltynie, Huw R. Morris, Nicholas W. Wood, Margaret T. May, Donald G. Grosset, Yoav Ben-Shlomo