Figure 1From: Evaluation design of a systematic, selective, internet-based, Chlamydiascreening implementation in the Netherlands, 2008-2010: implications of first results for the analysis Stepped wedge design: schematic of the phased implementation of Chlamydia Screening Implementation in three blocks (A,B, and C). The design enables comparison of prescreening (A1 and B1) and post-screening prevalences after the first round (A2 and B2) and after the second round (A3)Back to article page