In the original published version of this article, Table 1 was used from “Determination of elemental composition and median lethal dose of calabash chalk” by MB EKONG, AI PETER, TB EKANEM and EE OSIM published in Int J Biol Med Res. 2015; 6 (2): 4902–4906 as the corresponding author was unaware of that publication. To properly attribute credit to the work done and already communicated to the scientific community, Table 1 has been removed from the publication here and the sentence referring to it.
The presence and quantities of the different metallic elements in the calabash chalk is presented in Table 1 was replaced with:
The presence and quantities of the different metallic elements in the calabash chalk was previously published (Ekong et al., 2015).
The additional reference was added to the publication.
Ekong MB, Peter AI, Ekanem TB and Osim EE, Determination of elemental composition and median lethal dose of calabash chalk Int. J. Biol. Med. Res.. 2015; 6(2): 4902-4906
The authors apologize for the error. Both the HTML and PDF versions of the article have been updated to correct the errors.