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===Other===
 
===Other===
*ECG: rate and rhythm abnormalities
+
*ECG: rate and rhythm abnormalities <ref name="multiples">Tilley Smith'''The 5-Minute Veterinary Consult Canine and Feline''' (Third Edition), ''Lippincott, Williams and Wilkins''</ref>.
    
===Pathology===
 
===Pathology===
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