Asthma-Related Traits 4, also known as asthma-related traits, susceptibility to, 4, is related to dermatitis, atopic and allergic rhinitis. An important gene associated with Asthma-Related Traits 4 is ASRT4 (Asthma-Related Traits, Susceptibility To, 4). The drugs Montelukast and Histamine have been mentioned in the context of this disorder. Affiliated tissues include lung and skin.