Cathcart, M., Love, S. , Sutton, D.G.M , Parkin, T.D.H. and Hughes, K.J. (2012) The application of exhaled breath analysis in racing Thoroughbreds and influence of high intensity exercise on concentrations of nitric oxide and carbon monoxide 65 and pH in exhaled breath. Journal of Veterinary Internal Medicine , 26(2), pp. 418-440. (doi: 10.1111/j.1939-1676.2012.00912.x )