<qa>  What is the goal of this study?The objective of this study is to determine an efficacy of the combination of L. rhamnosus 19070-2 FloraActiveTM and L. reuteri DSM 122460 FloraActiveTM in decreasing cryfuss in infants aged 4 through 12 weeks with IC. The active group of infants will receive lactobacilli with vitamin D3 while the control group will receive vitamin D3 2 times daily as oil suspension for 28 days. Duration of infant fusscry will be measured at baseline and at the end of intervention to define a difference between the groups 