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
A 4-month-old Santa Gertrudis bull calf was presented to the I.S.U. Teaching Hospital after being found down in a field. Clinical examination revealed a slightly elevated temperature and spasm and severe pain of the neck muscles. Laboratory results included an extremely high CPK of greater than 5000 IU/L (normal = 0-200 IU/L). Cervical radiographs were taken.
Johnson, Sue and McNeel, Sandra
"What's Your Radiographic Diagnosis?,"
Iowa State University Veterinarian: Vol. 43
, Article 8.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol43/iss3/8