CD19 and sarcoidosis: The percentages and absolute numbers of CD19+ blood B cells were similar in the 3 patient groups (healthy controls: 7.5±1.2% and 111.5±23.2/mm3; active sarcoidosis: 8.3±0.9% and 106.0±15.4/mm3; and inactive sarcoidosis: 7.3±1.0% and 84.0±10.6/mm3).