Vitamin D Deficiency and Its Relation to Allergic Diseases: A Cross Sectional Study Among Allergic Patients from Jeddah City, Saudi Arabia Journal title: Journal of Clinical Immunology & Microbiology Authors: Amal A Abbas*, Johara Wajeeh, Hanan Wajeeh, Asma Alghamdi, Shahd Al Sharief Subject(s): Immunology, Microbiology