Sixteen years after a similar proposal, there is a new plan to build a state-of-the art children's hospital in San Antonio. Doctors at the University of Texas Health Science Center have been promoting the benefits of a new facility, with supporters citing a dearth of pediatric specialists because they are lost to high-level children's hospitals in other cities. But Christus Santa Rosa Children's Hospital, the main pediatric teaching facility in the area, opposes the idea.