BRISTOL, Tenn. — Plans to develop a new pediatric emergency department at Bristol Regional Medical Center got a boost this week when longtime community members stepped forward to endorse and support this new service for children in Sullivan County and Southwest Virginia. The J.D. Nicewonder Family Pediatric Emergency Department, a service of Niswonger Children’s Hospital, will feature a separate entrance and designated treatment rooms for children and their families. “Children and families are our greatest treasures, and we believe by supporting local health care, we’re making a substantial difference in their lives,” said J.D.