https://blogs.bmj.com/bmj/2017/06/05/paul-glasziou-and-iain-chalmers-can-it-really-be-true-that-50-of-research-is-unpublished/
Paul Glasziou and Iain Chalmers: Can it really be true that 50% of research is unpublished? - The...
Jun 19, 2017 - Whatever the precise non-publication rate is, it is a serious waste of the roughly $180 billion annually invested in health and medical research globally If...