Kalan Farmanfarma, K., Moslem, A. ., Ghorat, F. ., Nematshahi, M. ., Moslem, A., Salehiniya, H. . and Mahdavifar, N. . (2020) “The index case of COVID-19 in Northeastern Iran”, Monaldi Archives for Chest Disease, 90(4). doi: 10.4081/monaldi.2020.1593.