Preoperative intravenous iron for anaemia in elective major open abdominal surgery: the PREVENTT RCT oleh Toby Richards, Ravishankar Rao Baikady, Ben Clevenger, Anna Butcher, Sandy Abeysiri, Marisa Chau, Rebecca Swinson, Tim Collier, Matthew Dodd, Laura Van Dyck, Iain Macdougall, Gavin Murphy, John Browne, Andrew Bradbury, Andrew Klein