Maintenance: During the night from Tuesday to Wednesday, 28/29 May 2019, maintenance work on the ZORA NFS is scheduled for 7:00pm to 9:00am. During this period ZORA and JDB will not be available. Thank you for your patience.
Rohrer, Michael H; Paccaud, Fred; Haller, Elvire; Gutzwiller, Felix; Eggimann, Philippe (1989). The prevalence of back pain and associated risk factors in Swiss recruits in 1985. Journal of Manual Medicine, 4(1):22-24.