Erratum to: SpringerPlus (2016) 5:917 DOI 10.1186/s40064-016-2507-8

Upon publication of the original manuscript (Tchepmo Djomegni 2016), the author noticed that he had confused the manuscript with an extension version in which he is the sole author. Prof. Kesh Govinder also contributed to this manuscript, as the work was conducted under his supervision at the University of KwaZulu-Natal, which should be added as both authors’ affiliated institutions. Prof. Kesh Govinder has therefore been added as an author to this manuscript, and the affiliations updated, by means of this erratum.

Furthermore, the authors have amended the below statements:

New Competing interests statement: Both authors declare that they have no competing interests.

New Authors’ contribution statement: Both authors have contributed equally to the manuscript.