van den Bogert, CASouverein, PCBrekelmans, CTMJanssen, SWJKoëter, GHLeufkens, HGMBouter, LM2025-03-252025-03-2520162797357110.1371/journal.pone.0167709https://rivm.openrepository.com/handle/10029/649687Non-publication is common among phase 1, single-center, not prospectively registered, or early terminated clinical drug trialsArticlePlos One 2016; 11(12):e01677092025-03-25