Lidegaard 2009, Lidegaard 2011, Van Hylckama 2009, Jick 2006, Dinger 2007, Parkin 2011, Vasilakis-Scaramozza 2001, A-t 2001, Prescrire 2002, O’Connell 2007, Cole 2007, RCOG VTE 2010, FDA 2011, Prescrire 2009, DTB 2010
Lidegaard 2011, Lidegaard 2009, Van Hylckama 2009, Jick 2006, Dinger 2007, Parkin 2011, Vasilakis-Scaramozza 2001, A-t 2001, Prescrire 2002 ,R O’Connell 2007, Cole 2007 , RCOG VTE 2010, FDA 2011, Prescrire 2009, DTB 2010