2019 American Heart Association and American Red Cross Focused Update for First Aid: Presyncope: An Update to the American Heart Association and American Red Cross Guidelines for First Aid. - Charlton NP; Pellegrino JL; Kule A; Slater TM; Epstein JL; Flores GE; Goolsby CA; Orkin AM; Singletary EM; Swain JM (Circulation, 2019)