Erratum to: SpringerPlus (2016) 5:770 DOI 10.1186/s40064-016-2461-5

Upon publication of the original article (Mallam and Bhushana Rao 2016), it was noticed that K. Chandra Bhushana Rao’s name was incorrectly written as ‘K. Chandra Bhutan Rao’. This has now been updated.