Desirable properties for instruments assessing quality of life: evidence from the PDQ-39.
Fitzpatrick
R
R
Jenkinson
C
C
Peto
V
V
Hyman
N
N
Greenhall
R
R
D006801:Humans; D010300:Parkinson Disease / Q000628:therapy*; D011379:Prognosis; D011788:Quality of Life; D011795:Surveys and Questionnaires