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
As more and more people have moved into urban and suburban areas, there has been an increase in the amount of bone and joint surgery on small animals. Many of these cases are fractures but other conditions such as osteochondritis dissecans and Legg-Perthes' disease are increasing in incidence.
Tarvin, Guy and Hoefle, W. D.
"Two Orthopedic Conditions and Treatments in Dogs,"
Iowa State University Veterinarian: Vol. 35
, Article 3.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol35/iss3/3