title: The impact factor of the Netherlands Heart Journal in 2013.
authors.affiliation: Department of Clinical and Experimental Cardiology, Heart Failure Research Center, Academic Medical Center, Meibergdreef 9, Room K2-111, 1105 AZ, Amsterdam, the Netherlands, t.opthof@inter.nl.net.
authors.forename: T
authors.initials: T
authors.lastname: Opthof