TY - ECHAP AU - Fransen M. AU - Pham T. AU - Ravaud P. AU - Dougados M. AU - Ottawa Methods Group AU - Tugwell P. BT - Evidence Based Rheumatology CY - London LA - eng LB - injurybook PB - BMJ Publishing House PP - London PY - 2003 T2 - Evidence Based Rheumatology TI - Osteoarthritis ER -