Frequency of exacerbations	Group A	Group B	Test value*	P-value
Frequency of exacerbations	No. = 20	No. = 20	Test value*	P-value
Before supplementation
Less than 3 times	11 (55.0%)	13 (65.0%)	0.417	0.518
More than 3 times	9 (45.0%)	7 (35.0%)	0.417	0.518
After supplementation
Less than 3 times	14 (70%)	15 (75%)	0.125	0.724
More than 3 times	6 (30%)	5 (25%)	0.125	0.724
Test Value	0.960	0.476
P-Value	0.327	0.490