Smell identification ability in twin pairs discordant for Parkinson's disease (pages 687–693)Connie Marras, Samuel Goldman, Amanda Smith, Peter Barney, Diana Aston, Kathleen Comyns, Monica Korell, J. William Langston, G. Webster Ross and Caroline M. Tanner
Article first published online: 17 FEB 2005 | DOI: 10.1002/mds.20389