title: Evaluation of recurrent respiratory tract infections in children.
mesh_terms: D002648:Child; D003937:Diagnosis, Differential; D004198:Disease Susceptibility; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis; D007153:Immunologic Deficiency Syndromes / Q000276:immunology; D007223:Infant; D012008:Recurrence; D012141:Respiratory Tract Infections / Q000175:diagnosis* / Q000276:immunology
chemical_list: D007136:Immunoglobulins