1. Norwegian Knowledge Centre for Health ServicesPB 7004 St. Olavs plassOsloN‐0130Norway
2. Almeveien 36OsloNorway0855
3. The Norwegian Health Services Research CentrePB 7004 St. Olavs plassOsloNorwayN‐0130
4. Norwegian Knowledge Centre for Heatlh ServicesPB7004OsloNorwayN‐0130
5. Norwegian Institute of Public HealthPO BOX 4404 NydalenOsloNorwayN‐0403