CA6 and hand, foot and mouth disease: The majority of our CA6 strains displayed a close genetic relationship with the Chinese strains identified from other provinces in China and Taiwan, during 2010 and 2013, and these strains were also similar to strains from Thailand in 2012, Finland and Spain in 2008, Japan in 2011 and Cuba in 2012, which were associated with onychomadesis subsequent to HFMD.