Figure 1

The dotted lines represents the information flow, the solid lines represents the material flows. The test tubes represents the faecal samples transported from the GPs' clinics to the gastroenterology centre; the men represent the target population going to the test provider to pick up and return the samples; the letter envelopes represent the invitation by the program to the target population. In the region there are 12 Local Health Units and 20 gastroenterology centres, the target population of each GP and gastroenterology centre is not necessarily restricted to the LHU borders.