Funding

No sources of funding were used to assist in the preparation of this letter.

Conflicts of Interest

Anna Cronström, Eva Tengman and Charlotte Häger declare they have no conflicts of interest with the content of this letter.

Availability of Data and Materials

Not applicable.

Ethics Approval

Not applicable.

Informed Consent

Not applicable.

Author Contributions

All authors contributed to this letter and read and approved the final version.