Andersen, M, Andelius, T C K, Pedersen, M V, Kyng, K J & Henriksen, T B 2019, ' Severity of hypoxic ischemic encephalopathy and heart rate variability in neonates: a systematic review : a systematic review ', BMC Pediatrics, vol. 19, no. 1, 242 . https://doi.org/10.1186/s12887-019-1603-7, https://doi.org/10.1186/s12887-019-1603-7