LANDOVER, Md. The Asthma and Allergy Foundation of America on Thursday released its new list of the 100 “Allergy Capitals” (www.AllergyCapitals.com), naming Knoxville, Tenn. as the most challenging place to live with spring allergies this year due to high pollen counts, high use of allergy medications by patients and too few allergists to treat the burgeoning allergy population.