[1] Univ Southern Maine, Muskie Sch Publ Serv, Portland, ME 04102 USA
[2] Maine Med Ctr, Dept Emergency Med, 22 Bramhall St, Portland, ME 04102 USA
[3] Wake Forest Univ, Med Ctr Blvd, Winston Salem, NC 27157 USA
[4] York Hosp, 15 Hosp Dr, York, ME 03909 USA
[5] Tufts Univ, Maine Med Ctr, Sch Med, Dept Emergency Med, 22 Bramhall St, Portland, ME 04102 USA