**5. Conclusions**

In summary, we demonstrate overall inpatient prevalence among patients with GS between the years 2003 and 2014 in the United States, with 10.3 cases per 1,000,000 admissions. Although the in-hospital mortality rate was only 8%, hospitalization of patients with GS was associated with high hospital inpatient utilization and costs.

**Author Contributions:** Conceptualization, W.K., C.T., P.U., T.B., A.C., N.S., S.V., and W.C.; Data curation, WK and BB; Formal analysis, W.K.; Investigation, W.K., C.T., and W.C.; Methodology, W.K., C.T., S.V., and W.C.; Project administration, B.B., P.U., T.B., A.C., and N.S.; Resources, B.B.; Software, W.K.; Supervision, W.C.; Validation, W.K. and W.C.; Visualization, C.T. and T.B.; Writing—original draft, W.K.; Writing—review and editing, W.K., C.T., B.B., P.U., A.C., N.S., S.V., and W.C. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Conflicts of Interest:** We do not have any financial or non-financial potential conflict of interest.
