Ambulances Required to Relieve Overcapacity Hospitals: A Novel Measure of Hospital Strain During the COVID-19 Pandemic in the United States.

"Fundingandsupport: By Annals policy, all authors are required to disclose any and all commercial, financial, and other relationships in any way related to the subject of this article as per ICMJE conflict of interest guidelines (see www.icmje.org). The authors have stated that no such relationships exist. Dr. Ioannides was supported by the National Clinician Scholars Program at the University of California, Los Angeles. Dr. Schriger is partly funded by an unrestricted research grant from the Korein Foundation and serves as a deputy editor for Annals of Emergency Medicine, but, of course, recuses himself from any matters relating to this manuscript."

"Funding and support: By Annals policy, all authors are required to disclose any and all commercial, financial, and other relationships in any way related to the subject of this article as per ICMJE conflict of interest guidelines (see www.icmje.org ). The authors have stated that no such relationships exist. Dr. Ioannides was supported by the National Clinician Scholars Program at the University of California, Los Angeles. Dr. Schriger is partly funded by an unrestricted research grant from the Korein Foundation and serves as a deputy editor for Annals of Emergency Medicine , but, of course, recuses himself from any matters relating to this manuscript."