scholarly article by Kari Otterdal et al published 18 December 2018 in BMC Infectious Diseases
author: Thor Ueland, Pål Aukrust, Annika E. Michelsen, Kari Otterdal, Børre Fevang, Aase Berg, Nina Langeland, Marit G Tellevik, Christel Gill Haanshuus
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