Stimpson spent weeks meeting with some of the world's leading HIV specialists, immunologists and virologists. He plays the harmonica for a blues band of immunologists and oncologists called the Checkpoints. Most members of the AAAAI are board-certified allergist/immunologists. It serves as a resource for immunologists and researchers studying the evolution of mammalian immunity. He is an honorary member in American Association of Immunologists and American Society of Hematology. Allergy services may also be delivered by immunologists. GITR is currently of interest to immunologists as a co-stimulatory immune checkpoint molecule. It is currently of interest to immunologists as a co-stimulatory immune checkpoint molecule. It is of interest to immunologists as a co-stimulatory immune checkpoint molecule. In New York, Baruj worked with several other immunologists on different fields of hypersensitivity. Cambridge immunologists Robin Coombs (after whom it is named), Arthur Mourant and Rob Race. Previously, he served as president of the American Association of Immunologists. It is the official journal of the American Association of Immunologists. He served twice as president of the American Association of Immunologists, in 1947 and 1949. From 2005 to 2006, Allen served as the president of the American Association of Immunologists.