This article [1] has been retracted by the authors due to significant overlap with a previous publication by Malik et al., 2013 [2]. Gennaro Pagano was not involved in the study and was introduced into the author list in error by the corresponding author. All authors, including Gennaro Pagano, have subsequently agreed that he did not qualify for authorship. The remaining authors apologize for any inconvenience caused.


The online version of the original article can be found at 10.1186/1471-2482-13-S2-S26.