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McCambridge, J; Strang, J; (2006) The reliability of drug use data collected in the classroom: what is the problem, why does it matter and how should it be approached? Drug and alcohol review, 25 (5). pp. 413-8. ISSN 0959-5236 DOI: https://doi.org/10.1080/09595230600868496 Full text not available from this repository.

Holland, R; Smith, RD; Harvey, I; Swift, L; Lenaghan, E; (2004) Assessing quality of life in the elderly: a direct comparison of the EQ-5D and AQoL. Health economics, 13 (8). pp. 793-805. ISSN 1057-9230 DOI: https://doi.org/10.1002/hec.858 Full text not available from this repository.

Jenkins, R; Bebbington, P; Brugha, T; Farrell, M; Gill, B; Lewis, G; Meltzer, H; Petticrew, M; (2003) The National Psychiatric Morbidity Surveys of Great Britain--strategy and methods. International review of psychiatry (Abingdon, England), 15 (1-2). pp. 5-13. ISSN 0954-0261 DOI: https://doi.org/10.1080/0954026021000045895 Full text not available from this repository.

Bowden, A; Fox-Rushby, JA; Nyandieka, L; Wanjau, J; (2002) Methods for pre-testing and piloting survey questions: illustrations from the KENQOL survey of health-related quality of life. Health policy and planning, 17 (3). pp. 322-30. ISSN 0268-1080 DOI: https://doi.org/10.1093/heapol/17.3.322 Full text not available from this repository.

Edwards, P; Roberts, I; Clarke, M; DiGuiseppi, C; Pratap, S; Wentz, R; Kwan, I; (2002) Increasing response rates to postal questionnaires: systematic review. BMJ (Clinical research ed), 324 (7347). pp. 1183-5. ISSN 0959-8138 DOI: https://doi.org/10.1136/bmj.324.7347.1183

Lampe, FC; Whincup, PH; Shaper, AG; Wannamethee, SG; Walker, M; Ebrahim, S; (2001) Variability of angina symptoms and the risk of major ischemic heart disease events. American journal of epidemiology, 153 (12). pp. 1173-82. ISSN 0002-9262 DOI: https://doi.org/10.1093/aje/153.12.1173 Full text not available from this repository.

Smeeth, L; Fletcher, AE; Stirling, S; Nunes, M; Breeze, E; Ng, E; Bulpitt, CJ; Jones, D; (2001) Randomised comparison of three methods of administering a screening questionnaire to elderly people: findings from the MRC trial of the assessment and management of older people in the community. BMJ (Clinical research ed), 323 (7326). pp. 1403-7. ISSN 0959-8138 https://researchonline.lshtm.ac.uk/id/eprint/17002