In response to the comment that a lead level of 13 is not associated with learning problems: Lead levels between 10 and 20 (previously considered low) ARE associated with permanent irreversible learning problems (emphasis intentional). There is a considerable body of information about this in the pediatric literature. As this is not a central topic for LACTNET please email me if you want references, additional information. Pierrette Mimi Poinsett MD FAAP also member of Chapter 2 American Academy of Pediatrics Environmental Health Committee Modesto CA