Collins SP, Storrow AB, Levy PD, Albert N, Butler J, Ezekowitz JA, Felker GM, Fermann GJ, Fonarow GC, Givertz MM, Hiestand B, Hollander JE, Lanfear DE, Pang PS, Peacock WF, Sawyer DB, Teerlink JR, Lenihan DJ. Early management of patients with acute heart failure: state of the art and future directions--a consensus document from the SAEM/HFSA acute heart failure working group. Acad Emerg Med. 2015 Jan; 22(1):94-112.