Non‐motor phenotypic subgroups in adult‐onset idiopathic, isolated, focal cervical dystonia oleh Megan E. Wadon, Grace A. Bailey, Zehra Yilmaz, Emily Hubbard, Meshari AlSaeed, Amy Robinson, Duncan McLauchlan, Richard L. Barbano, Laura Marsh, Stewart A. Factor, Susan H. Fox, Charles H. Adler, Ramon L. Rodriguez, Cynthia L. Comella, Stephen G. Reich, William L. Severt, Christopher G. Goetz, Joel S. Perlmutter, Hyder A. Jinnah, Katharine E. Harding, Cynthia Sandor, Kathryn J. Peall