In a randomised double-blind controlled , parallel , multicountry intervention study , 767 healthy children , ages 11 to 29 months , received GUM with scGOS/lcFOS/LCPUFAs ( the active group , n = 388 ) , GUM without scGOS/lcFOS/LCPUFAs ( the control group , n = 379 ) , or cow 's milk ( n = 37 ) for 52 weeks .