Hergenhan, A., Steurer, M. and Berger, T.M. 2015. Gestational age-adapted oxygen saturation targeting and outcome of extremely low gestational age neonates (ELGANs). Swiss Medical Weekly. 145, 4546 (Nov. 2015), w14197. DOI:https://doi.org/10.4414/smw.2015.14197.