[1. Tulvatana W, Thinkhamrop B, Kulvichit K, Tatsanavivat P. Thai Clinical Trials Registry. J Evid Based Med. 2011; 4:182-4.10.1111/j.1756-5391.2011.01148.x23672723]Search in Google Scholar
[2. De Angelis C, Drazen JM, Frizelle FA, Haug C, Hoey J, Horton R, et al. Clinical trial registration: a statement from the International Committee of Medical Journal Editors. N Engl J Med. 2004; 351: 1250-1.10.1056/NEJMe04822515356289]Search in Google Scholar
[3. World Health Organizaion. International Clinical Trials Registry Platform (ICTRP): What is a clinical trial? Available at: http://www.who.int/ictrp/en/. Accessed May 3, 2011.]Search in Google Scholar
[4. World Health Organizaion. International Clinical Trials Registry Platform Search Portal. Available at: http://apps.who.int/trialsearch/. Accessed May 3, 2011.]Search in Google Scholar
[5. International Committee of Medical Journal Editors. Journals that have Requested Inclusion on the List of Publications that follow the ICMJE’s Uniform Requirements for Manuscripts Submitted to Biomedical Journals. Available at: http://www.icmje.org/journals.html. Accessed May 3, 2011.]Search in Google Scholar
[6. Committee on Publication Ethics. Members. Available at http://publicationethics.org/members. Accessed May 3, 2011.]Search in Google Scholar
[7. Kulvichit K, Kulwichit W, Lumbiganon P. Clinical trial registration. N Engl J Med. 2005; 352:198-9.10.1056/NEJM20050113352021615647584]Search in Google Scholar
[8. Reveiz L, Cortes-Jofre M, Asenjo Lobos C, Nicita G, Ciapponi A, Garcia-Dieguez M, et al. Influence of trial registration on reporting quality of randomized trials: Study from highest ranked journals. J Clin Epidemiol. 2010; 63:1216-22.10.1016/j.jclinepi.2010.01.01320430576]Search in Google Scholar
[9. Hopewell S, Altman DG, Moher D, Schulz KF. Endorsement of the CONSORT Statement by high impact factor medical journals: a survey of journal editors and journal ‘Instructions to Authors’. Trials. 2008; 9:20.10.1186/1745-6215-9-20235973318423021]Search in Google Scholar
[10. World Medical Association. WMA Declaration of Helsinki - Ethical Principles for Medical Research Involving Human Subjects. Available at: http://www.wma.net/en/30publications/10policies/b3/index.html. Accessed November 23, 2011.]Search in Google Scholar