1. INSERM U1153; METHODS team; 1, Place du parvis Notre Dame Paris France 75181 Cedex 4
2. Hôpital Hôtel-Dieu; French Cochrane Centre; 1 place du Parvis Notre-Dame Paris France 75004
3. Odense University Hospital and Univerity of Southern Denmark; Center for Evidence-Based Medicine; Sdr. Boulevard 29, Gate 50 (Videncenteret) Odense C Denmark 5000