Received: 11 March 2021
Accepted: 6 May 2021
First Online: 18 May 2021
: This is a quality development project where the systematic use of IV iron was implemented in the surgical ward, and therefore, the regional ethical committee of Northern Denmark waived the need for approval. The study was registered within the Danish Data Protection Authority (reference number 2008-58-0028).
: Not applicable.
: The authors declare that they have no competing interests.