Nalls, M. A., McLean, C. Y., Rick, J., Eberly, S., Hutten, S. J., Gwinn, K., Sutherland, M., Martinez, M., Heutink, P., Williams, N. M., Hardy, J., Gasser, T., Brice, A., Price, T. R., Nicolas, A., Keller, M. F., Molony, C., Gibbs, J. R., Chen-Plotkin, A., Suh, E., Letson, C., Fiandaca, M. S., Mapstone, M., Federoff, H. J., Noyce, A. J., Morris, H., Van Deerlin, V. M., Weintraub, D., Zabetian, C., Hernandez, D. G., Lesage, S., Mullins, M., Conley, E. D., Northover, C. A. M., Frasier, M., Marek, K., Day-Williams, A. G., Stone, D. J., Ioannidis, J. P. A., Singleton, A. B., & investigators*, P. D. B. P. a. P. P. M. I. (n.d.). diagnosis of Parkinson's disease on the basis of clinical and genetic classification: a population-based modelling study. Lancet neurology, 14(10), 1002–1009. http://access.bl.uk/ark:/81055/vdc_100026480553.0x000005