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Klinik für Neurologie, Universitätsklinikum Essen, Universität Duisburg-Essen, Duisburg, Germany Corresponding author. Address: Klinik für Neurologie, Universitätsklinikum Essen, Hufelandstr. 55, Essen 45147. Tel.: +49 201 723 2165. E-mail address: email protected (U. Bingel). Sponsorships or competing interests that may be relevant to content are disclosed at the end of this article.
Ulrike Bingel (Sat,) studied this question.