TY JOUR TI DIAGNOSIS AND TREATMENT OF TRACHEAL COLLAPSE IN DOGS KW collapsing trachea KW dog KW fluoroscopy JO Vestnik of Omsk SAU AU SNITKO, I.O. AU MYAGKOV, I.N. AU DOROFEEVA, V.P. AU DOROFEEVA, V.P. PY 2025 IS 58 PB FSBEI HE Omsk SAU