hellens et al. 2005, hellgren et al. 1999, hansen et al. 2004, hansen et al. 2012, hansen et al. 2011, hansen et al. 2010, hansen et al. 2013, sareen et al. 2005, hansen et al. 2006, helgeson et al. 1981, hannigan et al. 2005, hellier et al. 2003, han et al. 2005, cohen et al. 2005, van mechelen et al. 1992, hanson et al. 1991, hanson et al. 2006, hansen et al. 2016, andersen et al. 2001, whalen et al. 1987, hansen et al 2014, hansen et al 2015, martens et al 1990
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