Texas Children's Hospital on Tuesday affirmed plans to start a $506 million expansion to its flagship Texas Medical Center facility, regardless of falling oil prices and the resulting fallout for Houston's economy. Officials noted that parents of seriously ill children nationwide will still seek care at the hospital, which is moving ahead on a 19-floor project that will include a new heart center and expanded critical care, diagnostic and therapeutic services. The hospital on Tuesday revealed new details, including the cost for the project, which includes renovations to the current emergency center.