The Institute was one of two places where people were put into cryostasis. It was a private facility that shared resources and buildings with the Wendigo Institute of Botanical Research and the Blackwood Center for Chemical and Neurological Research, Military Division. Mildred Wyeth was one of the people frozen there before the companions found and revived her. (Northstar Rising)
While there isn't a Shelley Cryonic Institute, there is a real life Cryonics Institute, in Clinton Township, Michigan. The daughter of the first director was named Shelley, and both may have provided inspiration to the author.