Maintenance work on the ZORA database servers is scheduled for Thursday 25th July 2019 from 19:00-20:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Kedzia, Sarah; Kunz, Regina; Zeller, Andreas; Rosemann, Thomas; Frey, Peter; Sommer, Johanna; Herzig, Lilli; Alexanderson, Kristina; de Boer, Wout (2015). Sickness certification in primary care: a survey on views and practices among Swiss physicians. Swiss Medical Weekly, 145:w14201.