The group organized to establish a health information exchange network in Tennessee will close and is now winding down operations. The Health Information Partnership for Tennessee was created three years ago to set up a network that would allow healthcare organizations across the state to digitally share their information with one another. The group, known as HIP TN, is no longer responsible for implementing the network, but three Regional Health Information Organizations in Tennessee will still work to that end, HIP TN said in a release issued Monday.