@article{034536043, title = "Case-control study on Puumala virus infection: smoking is a risk factor", author = "Vapalahti, K. and Virtala, A.-M. and Vaheri, A. and Vapalahti, O.", year = "2010", journal = "Epidemiology and Infection", volume = "138", number = "4", pages = "576-584", issn = "1469-4409", doi = "10.1017/s095026880999077x", url = "https://eurekamag.com/research/034/536/034536043.php" }