title: Letter to the editor.
authors.affiliation: President and Chairman of The National Horsemen's Benevolent and Protective Association, Lexington, Kentucky, USA.
authors.forename: A D
authors.initials: AD
authors.lastname: Richards
mesh_terms: D000818:Animals; D004724:Endoscopy / Q000662:veterinary*; D006470:Hemorrhage / Q000662:veterinary*; D006734:Horse Diseases / Q000473:pathology*; D008171:Lung Diseases / Q000662:veterinary*; D010805:Physical Conditioning, Animal / Q000009:adverse effects*