Year, Count, Co-author(s) 2009,13,"Nichols, W. C.; Wilk, J. B.; Pankratz, N.; PSG-PROGENI and GenePD Investigators and Molecular Genetic Laboratories,; DeStefano, A. L.; Foroud, T.; GenePD Investigator,; Myers, R. H.; Pugh, E. W.; Halter, C.; Nance, Martha A., MD; Latourelle, J. C.; Gusella, J. F."