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Stephansson O, Kieler H, Haglund B, Artama M, Engeland A, Furu K, Gissler M, Nørgaard M, Nielsen RB, Zoega H, Valdimarsdóttir U.Stephansson O, et al. Among authors: nielsen rb.JAMA. 2013 Jan 2;309(1):48-54. doi: 10.1001/jama.2012.153812.JAMA. 2013.PMID: 23280224
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