Simuni, T., Uribe, L., Cho, H. R., Caspell-Garcia, C., Coffey, C. S., Siderowf, A., Trojanowski, J. Q., Shaw, L. M., Seibyl, J., Singleton, A., Toga, A. W., Galasko, D., Foroud, T., Tosun, D., Poston, K., Weintraub, D., Mollenhauer, B., Tanner, C. M., Kieburtz, K., Chahine, L. M., Reimer, A., Hutten, S. J., Bressman, S., Marek, K., & , (2020). clinical and dopamine transporter imaging characteristics of non-manifest LRRK2 and GBA mutation carriers in the Parkinson's Progression Markers Initiative (PPMI): a cross-sectional study. Lancet neurology, 19(1), 71–80. http://access.bl.uk/ark:/81055/vdc_100098443915.0x000016