Use of a case-control study and geographic information systems to determine environmental and demographic risk factors for canine leptospirosisGeorge S. Ghneim, Joshua H. Viers, Bruno B. Chomel, Philip H. Kass, Daphne A. Descollonges and Michael L. JohnsonVet. Res., 38 1 (2007) 37-50DOI: https://doi.org/10.1051/vetres:2006043