RT Journal Article SR Electronic T1 Introducing heart rate variability technology into the UK defence mild traumatic brain injury service JF BMJ Military Health JO BMJ Mil Health FD British Medical Journal Publishing Group SP e002113 DO 10.1136/bmjmilitary-2022-002113 A1 Houston, Andrew David A1 Brunger, H A1 White, T A1 Ellis, H A1 Dharm-Datta, S A1 Brockman, K A1 Ladlow, P YR 2022 UL http://militaryhealth.bmj.com/content/early/2022/05/17/bmjmilitary-2022-002113.abstract AB