1. De Angelis CD, Drazen JM, Frizelle FA, Haug C, Hoey J, Horton R, Kotzin S, Laine C, Marusic A, Overbeke AJ, Schroeder TV, Sox HC, Van Der Weyden MB: Is this clinical trial fully registered? A statement from the International Committee of Medical Journal Editors. Haematologica. 2006, 91: 293-295.
2. Dwan K, Altman DG, Arnaiz JA, Bloom J, Chan AW, Cronin E, Decullier E, Easterbrook PJ, Von Elm E, Gamble C, Ghersi D, Ioannidis JP, Simes J, Williamson PR: Systematic review of the empirical evidence of study publication bias and outcome reporting bias. PLoS One. 2008, 3: e3081-10.1371/journal.pone.0003081.
3. Scherer RW, Langenberg P, von Elm E: Full publication of results initially presented in abstracts. Cochrane Database Syst Rev. 2007, 18 (2): MR000005-
4. Chalmers I, Glasziou P: Avoidable waste in the production and reporting of research evidence. Lancet. 2009, 374: 86-89. 10.1016/S0140-6736(09)60329-9.
5. WHO: New standards for registration of human medical research. World Health Organization international clinical trials registry platform. 2006, World Health Organization, Geneva, http://www.who.int/mediacentre/news/rele?ases/2006/pr25/en/ ,