Retraction Note to: BMC Infectious Diseases 2014, 14:182 https://doi.org/10.1186/1471-2334-14-182
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Apparent similarities of the backgrounds in lanes 4 and 5 in Fig. 2 in the original article, as well as lanes 3–4 in Image 1A in the correction [1].
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Apparent similarities of the backgrounds in lane 2 of Fig. 1 and lane 2 of Fig. 2 in the original article, as well as lanes 1 and 6 in Image 1A in the correction [1].