Quantitation of canine regulatory T cell populations, serum interleukin-10 and allergen-specific IgE concentrations in healthy control dogs and canine atopic dermatitis patients receiving allergen-specific immunotherapy - Keppel, KE; Campbell, KL; Zuckermann, FA; Greeley, EA; Schaeffer, DJ; Husmann, RJ (Vet Immunol Immunopathol, 2008)