Agirre, Jon http://orcid.org/0000-0002-1086-0253
Iglesias-Fernández, Javier
Rovira, Carme
Davies, Gideon J http://orcid.org/0000-0002-7343-776X
Wilson, Keith S
Cowtan, Kevin D http://orcid.org/0000-0002-0189-1437
Article History
First Online: 4 November 2015
Competing interests
: The authors declare no competing financial interests.