Received: 24 January 2019
Accepted: 18 July 2019
First Online: 31 July 2019
Ethics approval and consent to participate
: For this review not applicable.The PlaComOv-study will be carried out according to the standards outlined in the Declaration of Helsinki. Ethics committee approval has been granted. All procedures involving patients have been approved by the Medical Ethical Committee of Erasmus Medical Centre Rotterdam in the Netherlands (trial protocol version 3.0 d.d. 20th November 2017, NL62035.078.17).
: Not applicable.
: GN, JK and HB declare that they have no competing interests.