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Determination of the longitudinal validity and minimally important difference of the 8-item Parkinson’s Disease Questionnaire (PDQ-8)

Authors:
Luo, Nan; Tan, Louis C. S.; Zhao, Yingjiao; Lau, Puay-Ngoh; Au, Wing-Lok; Li, Shu Chuen
Journal:
Movement Disorders
Year:
2009
DOI