Pesce F1, Prezioso D 2, Zattoni F 3, Artibani W 4, Tubaro A 5, Scarpa R M6, Rizzi C A7 1. Policlinico G. Rossi, Verona-Italy, 2. Policlinico Federico II, Napoli- Italy, 3. Az. Ospedaliera S. Maria della Misericordia, Udine -Italy, 4. Policlinico G. Rossi, Verona- Italy, 5. Ospedale S. Andrea, Roma - Italy, 6. Ospedale di Orbassano, Torino- Italy, 7. Boehringer-Ingelheim Italia, Milano - Italy

Hannestad Y1, Lie R T2, Rortveit G1, Hunskaar S1 1. Section for General Practice, Dept of Public Health and Primary Health Care,University of Bergen, 2. Section for Medical Statistics, Dept of Public Health and Primary Health Care,University of Bergen

van Brummen H J1, Heintz P1, van der Vaart H1 1. University Medical Center Utrecht

Mueller E 1, Latini J 2, Lux M2, Stablein U 1, Brubaker L1, Kreder K 2, FitzGerald M P 1 1. Loyola University Medical Center, 2. University of University of Iowa Medical Center

Seim A1, Hoyo C2, Ostbye T 2, Vatten L 1 1. Norwegian University of Science and Technology, Dept. of Community Medicine and General Practice, 2. Duke University Medical Center, Dept. of Community and Family Medicine

Huang Foen Chung J W N C1, van Mastrigt R1 1. Department of Urology, Sector Furore, Erasmus MC