title: Erratum to: Evaluation of chemical castration with calcium chloride versus surgical castration in donkeys: testosterone as an endpoint marker.
authors.affiliation: Department of Surgery, Anesthesiology and Radiology, Faculty of veterinary medicine, Assuit University, Assuit, 70155, Egypt. elgrah38@gmail.com.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Ibrahim
authors.affiliation: Department of Surgery, Anesthesiology and Radiology, Faculty of veterinary medicine, Assuit University, Assuit, 70155, Egypt.
authors.forename: Magda M
authors.initials: MM
authors.lastname: Ali
authors.affiliation: Department of Medical physiology, Faculty of medicine, Assuit University, Assuit, Egypt.
authors.forename: Nasser S
authors.initials: NS
authors.lastname: Abou-Khalil
authors.affiliation: Department of Pathology and clinical pathology, Faculty of veterinary medicine, Assuit University, Assuit, Egypt.
authors.forename: Marwa F
authors.initials: MF
authors.lastname: Ali