Distributions of patients with PTB, pleural TB, and other EPTB in IS6110 families. The IS6110 family numbers are arbitrary numbers used in our laboratory. Key to superscript numbers: 1, this group contains patients with PTB and patients with both PTB and EPTB; 2, lymph node TB; 3, one meningitis and one cutaneous TB; 4, peritoneal TB; 5, two peritoneal TB and one lymph node TB; 6, meningitis; 7, one peritoneal TB and one bone TB; 8, ear, nose, and throat TB.