Funding

No funding was received for this study.

Conflict of interest

No conflicts of interest to declare.

Ethics approval

This article does not contain any studies with human participants or animals performed by the authors.

Consent to participate

Not applicable.

Consent for publication

The authors jointly and independently give the publisher the permission to publish their work.

Availability of Data and Material

R code, Data and Materials are available in the public domain.

Code Availability

Code is available upon reasonable request from the authors.

Author contributions

Both authors contributed equally and approved the final version of the manuscript for publication.