The authors apologise for the affiliation given for Mitra Sharbatkhori7 being incorrect.
The corrected affiliation for Mitra Sharbatkhori7 is as follows:
7Infectious Diseases Research Center, Golestan University of Medical Sciences, Gorgan, Iran.
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Published online by Cambridge University Press: 12 March 2019
The authors apologise for the affiliation given for Mitra Sharbatkhori7 being incorrect.
The corrected affiliation for Mitra Sharbatkhori7 is as follows:
7Infectious Diseases Research Center, Golestan University of Medical Sciences, Gorgan, Iran.