Campbell, JL; Ramsay, J; Green, J; (2001) Age, gender, socioeconomic, and ethnic differences in patients' assessments of primary health care. Quality in health care, 10 (2). pp. 90-5. ISSN 0963-8172 https://researchonline.lshtm.ac.uk/id/eprint/17261 Full text not available from this repository.