Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
The disease problem described here has been diagnosed with increased frequency in Iowa during the last few years. The literature contains very few references to perirenal edema as a lesion in swine, and even fewer references to the condition as a distinct disease syndrome.
Buck, W. M.; Preston, K. S.; and Abel, Michael
"Common Weeds as a Cause of Perirenal Edema In Swine,"
Iowa State University Veterinarian: Vol. 27
, Article 1.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol27/iss3/1