CONDITIONS AGGRAVATED BY INHALATION OF COLD AIR--PROPHYLAXIS WITH A FACE  MASK THAT PREHEATS INHALED AIR.
D019069:Cell Respiration; D003080:Cold Temperature; D004864:Equipment and Supplies; D006331:Heart Diseases; D006801:Humans; D008397:Masks; D010827:Physiology; D012119:Respiration; D012140:Respiratory Tract Diseases
COLD; EQUIPMENT AND SUPPLIES; HEART DISEASES; PHYSIOLOGY; RESPIRATION; RESPIRATORY TRACT DISEASES