error of the mean], ranging from 29.0 to 85.0 days) or a prebiotic formula
containing 0.8 g of GOS-FOS/100 ml in a 9 to 1 ratio (OSF group; age, 51.9
7.2 days, ranging from 30.0 to 86.0 days). A group of exclusively breast-fed infants
was studied in parallel and used as a reference (BF group; age: 56.7 7.4 days,
ranging from 27.0 to 88.0 days). For study details, see also references 16 and 21