Breast milk was collected from 52 primipara women, aged 23-35, living in Israel for the last
10 years who gave birth to singleton full term healthy infants. Samples, collected at 3-17 weeks postpartum,
were stored at -20 C until sent to the WHO Reference Laboratory, State Laboratory for Chemical and
Veterinary Analysis of Food (CVUA), in Frieburg, Germany for a single pooled analysis. Mothers were
provided with the pooled analysis results