Article History
Received: 15 August 2017
Accepted: 12 July 2018
First Online: 31 July 2018
Ethics approval and consent to participate
: Data for this study were obtained from the multi-instrument comparison study which was approved by the Monash University Human Research Ethics Committee (Project numbers: CF11/1758–2,011,000,974 and CF11/3192–2,011,001,748).
: Not applicable.
: CG is a member of the EuroQol Group. The other authors declare that they have no competing interests.
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