Improving quality of care and outcome at very preterm birth: the Preterm Birth research programme, including the Cord pilot RCT oleh Lelia Duley, Jon Dorling, Susan Ayers, Sandy Oliver, Charles William Yoxall, Andrew Weeks, Chris Megone, Sam Oddie, Gill Gyte, Zoe Chivers, Jim Thornton, David Field, Alexandra Sawyer, William McGuire