The Oxford Participation & Activities Questionnaire (Ox-Paq): Psychometric Analysis.

@article{Morley2015TheOP,
  title={The Oxford Participation & Activities Questionnaire (Ox-Paq): Psychometric Analysis.},
  author={David Morley and Sarah Dummett and Jill Dawson and Raymond Fitzpatrick and David Churchman and Linda Kelly and Crispin C Jenkinson},
  journal={Value in health : the journal of the International Society for Pharmacoeconomics and Outcomes Research},
  year={2015},
  volume={18 7},
  pages={A742}
}