Text and Data Mining valid from 2020-03-30
Received: 20 December 2019
Accepted: 28 February 2020
First Online: 30 March 2020
Ethics approval and consent to participate
: Ethical approval was obtained from the regional committee (study number: 2014/210; Regionala Etikprövningsnämnden, Uppsala, Sweden) for the ABOTrauma Registry. The ethical committee of the medical association of Saxony-Anhalt Germany waived the need for ethical approval for the current study (ethical committee number 70/19).
: Not applicable.
: The authors declare that they have no competing interests.