A variety of approaches will be adopted (subject to ethical approval) to measure aim three, incorporating quantitative and qualitative data sources (measures), including: a selective evidence synthesis of existing research related to patient and staff views of screening for infection online survey of all clinical staff groups, using a combination of Likert scale questions with associated open response opportunities to enable expansion or explanation of their views on-going thematic analysis of an on-line discussion board (specially designed as part of the evaluation project) for clinical staff to encourage anonymous posting of views and experiences focus group discussions with a randomised sample of clinical staff at each Pathfinder board, stratified according to staff grouping, using the nominal group technique to prioritise concerns and generate recommendations for future screening telephone interviews with recently discharged service users (patients and primary visitor...