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APA Citation
Ziebland, S., Fitzpatrick, R., Jenkinson, C., Mowat, A., & Mowat, A. (1992). comparison of two approaches to measuring change in health status in rheumatoid arthritis: the Health Assessment Questionnaire (HAQ) and modified HAQ.. Annals of the rheumatic diseases, 51(11), 1202–1205. http://access.bl.uk/ark:/81055/vdc_100137789136.0x000061