Authors
Milomir Kovač
Veterinary Clinic – New Century, Skryabin Moscow State Veterinary Academy; Moskow, Krasnogorsky district,, Nikolo-Uryupino, Russian Federation
Bernhard Huskamp
Veterinary Clinic – Gescher-Hochmoor,, Gescher, Germany
Wolfgang Scheidemann
Veterinary Clinic – Gescher-Hochmoor,, Gescher, Germany
Joseph Toth
Veterinary Clinic – Gescher-Hochmoor,, Gescher, Germany
Zoran Tambur
Instittute of Hygiene, Military Medical Academy, Belgrade, Serbia and Faculty of Stomatology in Pančevo,, Pančevo, Serbia