The aim of this study was to investigate the effect of growing-up milk ( GUM ) with added short-chain galacto-oligosaccharides ( scGOS ) / long-chain fructo-oligosaccharides ( lcFOS ) ( 9:1 ) ( Immunofortis ) and n-3 long-chain polyunsaturated fatty acids ( LCPUFAs ) on the occurrence of infections in healthy children attending day care centres .