1. Definition of plagiarism. Merriam-Webster Online Dictionary. 2015. Available at: http://www.merriam-webster.com/. Accessed April 17, 2015.
2. COPE. Text recycling guidelines. 2015. Available at: www.publicationethics.org. Accessed April 17, 2015.
3. ICMJE. Clinical trials registration. Guidelines for registering clinical trials. 2015. Available at: www.icmje.org. Accessed April 23, 2015.
4. ICMJE. Authorship guidelines. 2015. Available at: www.icmje.org. Accessed April 17, 2015.
5. A multi-journal partnership to highlight joint first-authors of manuscripts;Omary;Gastrointest Endosc,2015