2.2. Anthropometric, Demographic Data, and Blood Sample Collection
At the enrollment visit, pre-study feeding regimens, birth anthropometric measurements, gestational age, and demographic data were collected, including race, number, and ages of siblings in the home, and mode of delivery. At 6 weeks (±3 days) of age parents were questioned to determine eligibility for optional blood sampling. The following exclusion criteria were applied: >240 mL per week of an alternate feeding other than the assigned study formula or >2 breastfeedings;Use of any alternate feeding in the preceding 48 h;Maternal or infant use of any oral anti-inflammatory medication.