Sturevik-Storm, Anna
Aldahan, Ala
Possnert, Göran
Berggren, Ann-Marie
Muscheler, Raimund
Dahl-Jensen, Dorthe
Vinther, Bo M.
Usoskin, Ilya
Article History
Received: 9 September 2013
Accepted: 19 August 2014
First Online: 30 September 2014
Competing interests
: The authors declare no competing financial interests.