patients and methods medical records of patients were analyzed retrospectively. results of the six patients, 83.3% (n = 5) were male and 16.7% (n = 1) were female, with a mean age of 2.1 ± 0.49 years. the most common clinical signs were dyspnea (83.3%), fever (66.6%), and vomiting (66.6%). owing to supportive treatments and the combined steroid treatment, respiratory distress diminished and the...