TY - STAND AU - K. Jordan AU - A. Clarke AU - D. Symmons AU - D. Fleming AU - M. Porcheret AU - U. Kadam AU - P. Croft BT - Br J Gen Pract M1 - 534 PY - 2007 SP - 7 EP - 14 T2 - Br J Gen Pract TI - Measuring disease prevalence: a comparison of musculoskeletal disease using four general practice consultation databases VL - 57 SN - 0960-1643 (Print) 0960-1643 ER -