Observations on the effect of age on the severity of heart valve lesions in the dog.
D000367:Age Factors; D000818:Animals; D004283:Dog Diseases / Q000473:pathology*; D004285:Dogs; D005260:Female; D006349:Heart Valve Diseases / Q000473:pathology / Q000662:veterinary*; D006351:Heart Valves / Q000473:pathology; D008297:Male