1. Allergy & Asthma Associates of Southern California; Mission Viejo California
2. Bensch Research Associates; Stockton California
3. Allergy & Asthma Specialists Medical Group; Huntington Beach California
4. Allegheny-Singer Research Institute; Pittsburgh Pennsylvania
5. Allergy Associates Medical Group, Inc.; San Diego California
6. Merck & Co. Inc.; Whitehouse Station New Jersey