Theron Randolph, who set up an inpatient clinical ecology unit at a Chicago hospital, where he isolates people from most allergens and then tests them with one allergen at a time.

• 之所以提出这个观点，主要是想说明，宠物可能导致环境中令人过敏的因素增加，但宠物本身并不一定是过敏源。