Am J Epid 147, 516-522. Br J Rheum 37, 1069-1076. Hay EM . Knee Pain - the place for total knee replacement. The Royal College of GP Members Reference Book.
Outcome measures for low back pain research.
A proposal for standardized use. Spine 18, 2003-2013. British Medical Journal 316, 1356-1359. Family Practice 15, 519-524. J Epidemiol Community Health 53, 144-148.