Funding for this research was provided by:
Chulalongkorn University (Chulalongkorn University Graduate Scholarship to Commemorate the 72nd Anniversary of His Majesty King Bhumibol Adulyadej)
Received: 8 January 2020
Accepted: 22 July 2020
First Online: 6 August 2020
Ethics approval and consent to participate
: Due to the retrospective study model, the ethics approval and written consents from owners were waived by the Chulalongkorn University Animal Care and Use Committee (CU-AICUC), Faculty of Veterinary Science, Chulalongkorn University. The owner consents were verbally obtained through the telephone calls. All retrospective data both of written information and image data under the copyright of the Small Animal Teaching Hospital were allowed to use for study by the committee of the Small Animal Teaching Hospital, Faculty of Veterinary Science, Chulalongkorn University.
: Not Applicable.
: The authors declare that they have no competing interests and do not have any potential conflict of interest to declare.