Over the course of the Utah property-tax dispute, not-for-profit hospitals have battled a typically unseen enemy--for-profit hospitals. While not-for-profits long have suspected the state's for-profit facilities of feeding unflattering information about them to tax assessors, the media and the public, recent property-tax hearings have unmasked at least one nemesis of Utah's not-for-profits: HealthTrust--The Hospital Co.