title: Regarding "heart rate variability in patients with chest pain at the ED".
authors.affiliation: Department of Emergency Medicine Singapore General Hospital 169608 Singapore. Electronic address: marcus.ong.e.h@sgh.com.sg.
authors.forename: Marcus Eng Hock
authors.initials: ME
authors.lastname: Ong
authors.affiliation: Department of Emergency Medicine Singapore General Hospital 169608 Singapore. Electronic address: liu.nan@sgh.com.sg.
authors.forename: Nan
authors.initials: N
authors.lastname: Liu
mesh_terms: D002637:Chest Pain / Q000175:diagnosis*; D005260:Female; D006331:Heart Diseases / Q000175:diagnosis*; D006339:Heart Rate; D006801:Humans; D008297:Male