PT - JOURNAL ARTICLE AU - Thomas M Berger TI - Guidelines for the management of extremely preterm deliveries in the grey zone of viability between 23 and 24 weeks’ gestation vary widely in developed countries AID - 10.1136/ebmed-2015-110288 DP - 2015 Dec 01 TA - Evidence Based Medicine PG - 227--227 VI - 20 IP - 6 4099 - http://ebm.bmj.com/content/20/6/227.short 4100 - http://ebm.bmj.com/content/20/6/227.full SO - Evid Based Med2015 Dec 01; 20