Erratum to: Comp Clin Pathol

DOI 10.1007/s00580-009-0865-0

Hedayat Hosseini, Mahzad Aghazadeh Meshgi, Ramin Khaksar, Marzieh Hosseini and Mansour Khakpour were listed as co-authors. However, they were not involved in writing the article and have requested that their names be removed. The only author of the paper is Dr. Hamid Reza Tavakoli.