Skip to main content
  • Retraction Note
  • Open access
  • Published:

Retraction Note: Improved treatment of Asthma by using natural sources of antioxidants

The Original Article was published on 26 June 2013


The original version of this paper (Van Toan and Thi Hanh 2013) is retracted because of ethical concerns: the clinical trial was not approved by an ethical board and the authors did not provide evidence that patient consent was obtained. The scientific advisor for this clinical trial (ANZCTR 2012) at the University of the West of England UK (an affiliation of the corresponding author) indicated he was not aware of this study and that the university was not involved.

It is a requirement that experimental research reported in SpringerPlus was performed with the approval of an appropriate ethics committee, and that research carried out on humans must be in compliance with the guidelines of the World Medical Association.

Dr. Max Haring, Executive Editor for SpringerPlus


Download references

Author information

Authors and Affiliations


Corresponding author

Correspondence to Nguyen Van Toan.

Additional information

The online version of the original article can be found at 10.1186/2193-1801-2-278

Rights and permissions

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Van Toan, N., Thi Hanh, T. Retraction Note: Improved treatment of Asthma by using natural sources of antioxidants. SpringerPlus 3, 558 (2014).

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: