%0 Journal Article %T Retraction: Effect of controlled and uncontrolled cooling rate on motility parameters of cryopreserved ram spermatozoa %A Iraj Ashrafi %A Hamid Kohram %A Hamid Naijan %A Majid Bahreini %A Hamid Mirzakhani %J BMC Research Notes %D 2012 %I BioMed Central %R 10.1186/1756-0500-5-319 %U http://www.biomedcentral.com/1756-0500/5/319