The prehospital and paramedicine filters are based on two published studies. Both studies are available as Open Access. Click the links to see the full text.
Burgess, S., Smith, E., Piper, S. & Archer F., 2010. The development of an updated prehospital search filter for the Cochrane Library: Prehospital Search Filter Version 2.0. Australasian Journal of Paramedicine, 8(4). Available from: https://ajp.paramedics.org/index.php/ajp/article/view/82/84 [Accessed 21 October 2017].