Table 1. Number of patients in all medical centers and their reasons for exclusion from study.

Center	Total no. patients	Absence of mycobacterial culture (%)	Age <5 y	Other causes*	No. patients included
A	134	36 (27)	5	11	82
B	82	74 (90)	7	1	0
C	75	28 (37)	13	3	31
D	71	14 (20)	14	1	42
E	60	26 (43)	14	2	18
F	31	17 (55)	4	2	8
G	15	8 (54)	2	0	5
Total	468	203 (72)	59 (21%)	20 (7%)	186

*Other causes, lung transplantation, immunosuppressive therapy, dropped from follow-up.