Growing up milk and recurrent upper respiratory infections in children

INTERVENTION: young child formula with added short‐chain galactoolichosaccharides, long‐chain fructooligosaccharides and n‐3 long chain polyunsaturated fatty acids CONDITION: Children, Upper respiratory tract infection ; ; PRIMARY OUTCOME: decrease number of days a month with upper respiratory tract infection SECONDARY OUTCOME: laboratory parameters; immunoglobulins, hemoglobulin, vitamins INCLUSION CRITERIA: age 12‐36 months recurrent upper respiratory tract infections (>1 a month in the last 3 months) familiar with cow milk drinking understanding dutch language written informed consent