Tabuchi, Ayako, et al. “A Large Outbreak of Enterohemorrhagic Escherichia Coli O157, Caused by Low-Salt Pickled Napa Cabbage in Nursing Homes, Japan, 2012”. Western Pacific Surveillance and Response, vol. 6, no. 2, Apr. 2015, https://doi.org/10.5365/wpsar.2014.5.1.012.