title: Environmental factors affecting seasonal variation in immunity of clinically normal dogs.
mesh_terms: D000818:Animals; D055580:Astronomical Phenomena; D001256:Astronomy; D004285:Dogs / Q000276:immunology*; D004781:Environmental Exposure; D005260:Female; D007111:Immunity, Cellular / Q000528:radiation effects; D008280:Magnetics; D008297:Male; D008685:Meteorological Concepts; D012621:Seasons