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New shift model for doctors in the University Hospital of Gynaecology and Obstetrics Tübingen, Germany becoming effective in April 2008. BD: on-call duty in house, RD: on-call duty at home (dotted boxes). Orange: service hours. Blue: shift of junior doctors (AssA). Green: shifts of experienced doctors (FA). Yellow: Shifts of senior doctors (OA). IVF: in vitro fertilization.
