Immunology / Adolescent / Histamine / Humans / Female / Animals / Male / Immunoglobulin E / Adult / Public health systems and services research / Mites / Leukocytes / Enzyme Linked Immunosorbent Assay / Dermatophagoides pteronyssinus / Animals / Male / Immunoglobulin E / Adult / Public health systems and services research / Mites / Leukocytes / Enzyme Linked Immunosorbent Assay / Dermatophagoides pteronyssinus