%0 Journal Article %T Nonmotor Features in Parkinson's Disease: What Are the Most Important Associated Factors? %A Liis Kadastik-Eerme %A Mari Muldmaa %A Marika Rosenthal %A Nele Taba %A Pille Taba %A Stella Lilles %J Archive of "Parkinson's Disease". %D 2016 %R 10.1155/2016/4370674 %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4853954/