Authors: Helena Malmström; Anna Linderholm; Pontus Skoglund; Jan Storå; Per Sjödin; M Thomas P Gilbert; Gunilla Holmlund; Eske Willerslev; Mattias Jakobsson; Kerstin Lidén; Anders Götherström Journal: Philos Trans R Soc Lond B Biol Sci Date: 2015-01-19 Impact factor: 6.237