Long–Evans hooded timed-pregnant female or adult male rats
were obtained from Charles River Laboratory (Raleigh, NC). All rats
were housed on hardwood chip bedding (Beta-Chip®) with EnviroDri®
added for nesting and enrichment, and provided free access to
food (Purina Rodent chow) and water (filtered tap). The animal
facilities have regulated temperature (70± 2 °F) and humidity (50%±
20%) and are accredited by AAALAC International. All procedures were
approved by the NHEERL Institutional Animal Care and Use
Committee.