1. WMA Declaration of Helsinki—Ethical Principles for Medical Research Involving Human Subjects. http://www.wma.net/en/30publications/10policies/b3/index.html
2. World Health Organization. International clinical trials registry platform (ICTRP). http://www.who.int/ictrp/trial_reg/en/
3. CONSORT (2010) Transparent reporting of trials. http://www.consort-statement.org/consort-2010
4. ICMJE. Recommendations for the Conduct, Reporting, Editing, and Publication of Scholarly Work in Medical Journals. Updated December 2014. http://www.icmje.org/icmje-recommendations.pdf
5. Emdin C, Odutayo A, Hsiao A, et al. (2015) Association of cardiovascular trial registration with positive study findings: epidemiological study of randomized trials (ESORT). JAMA Int Med 175:304–307