RT Journal Article SR Electronic T1 State of the science: heart rate variability in health and disease JF BMJ Supportive & Palliative Care JO BMJ Support Palliat Care FD British Medical Journal Publishing Group SP 274 OP 276 DO 10.1136/bmjspcare-2018-001588 VO 9 IS 3 A1 David Joyce A1 Michelle Barrett YR 2019 UL http://spcare.bmj.com/content/9/3/274.abstract AB