Biggin, A. J.
Piispa, E. J.
Pesonen, L. J.
Holme, R.
Paterson, G. A.
Veikkolainen, T.
Tauxe, L.
Article History
Received: 7 May 2015
Accepted: 20 August 2015
First Online: 7 October 2015
Competing interests
: The authors declare no competing financial interests.