Erratum to: Chromatographia DOI 10.1007/s10337-016-3064-6

The publisher would like to call the reader’s attention to the fact that unfortunately the Compliance with ethical standards section was not correctly displayed.

The correct Compliance with ethical standards section is given below:

Conflict of interest

There are no competing interests to declare.

Ethical approval

The clinical trials were conducted according to the guidelines of “World Medical Associations, Declaration of Helsinki ethical principles for medical research involving human subjects” and were approved by the Ethics Committee of the Department of Pharmacy, University of Peshawar (Trial number 02/EC-12/Pharm).

Informed consent

A written informed consent was obtained from all the participants enrolled in the study.

Our sincere apologies to the authors.