Assessment of dyspnea early in acute heart failure: patient characteristics and response differences between likert and visual analog scales.
Pang PS, Collins SP, Sauser K, Andrei AC, Storrow AB, Hollander JE, Tavares M, Spinar J, Macarie C, Raev D, Nowak R, Gheorghiade M, Mebazaa A. Assessment of dyspnea early in acute heart failure: patient characteristics and response differences between likert and visual analog scales. Acad Emerg Med. 2014 Jun; 21(6):659-66.