Risk factors that may exhibit seasonal epidemicity include diet, infectious agents, allergens, and antihistamine use.
Jimmy Thomas Efird 2010, 'Sinusoidal Cox Regression—A Rare Cancer Example', Cancer Informaticshttps://doi.org/10.4137/CIN.S6202. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)