Sites are informational, the products that I have used and like are in italic: (nothing against the ones not in italic, your products are not in my area)
Note: this is not a complete list of resources.
American College of Allergy, Asthma and Immunology (ACAAI)
85 West Algonquin Road, Suite 550
Arlington Heights, IL 60005
(847) 427-1200 or (800) 842-7777