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BMC Infectious Diseases > 2019 > 19 > 1 > 1-8
International Journal of Public Health > 2019 > 64 > 5 > 713-720
BMC Research Notes > 2018 > 11 > 1 > 1-6
BMC Infectious Diseases > 2019 > 19 > 1 > 1-8
International Journal of Public Health > 2019 > 64 > 5 > 713-720
BMC Research Notes > 2018 > 11 > 1 > 1-6