CD40LG and pneumonia: Tests performed for inpatients were as follows: blood test, including blood cell count and general biochemical tests (n = 78); measles IgM antibody titer (n = 78); chest X-ray to rule out pneumonia (n = 45); brain computed tomography scans for complicated febrile convulsion cases (n = 2); and abdominal ultrasonography for severe diarrhea cases (n = 26).