Ern, Rasmus
Huong, Do Thi Thanh
Phuong, Nguyen Thanh
Madsen, Peter Teglberg
Wang, Tobias
Bayley, Mark
Article History
Received: 6 August 2014
Accepted: 29 April 2015
First Online: 1 June 2015
Competing interests
: The authors declare no competing financial interests.