After a 15-month review of safety data on seven phthalates, or plasticizers -- the chemicals used to give plastics such characteristics as flexibility and strength -- an expert panel set up by the NIEHS/NTP's Center for the Evaluation of Risks on Human Reproduction (http://cerhr.niehs.nih.gov/index.html), has expressed "serious concern about the use of one of the chemicals, DEHP, to make polyviny