Case-control study for risk factors for Q Fever in southwest England and Northern Ireland Orr, H J and Christensen, H and Smyth, B and Dance, D AB and Carrington, D and Paul, I and Stuart, J M and on behalf of the South West Q Fever Project Group, Eurosurveillance, 11, 655 (2006), https://doi.org/10.2807/esm.11.10.00655-en