We inform our readers and authors that, due to a technical error, some articles in recent issues were published with two licenses simultaneously: CC BY and CC BY-SA. This issue has been resolved starting from volume 34.2, and it will not occur again.
CUHSO is published under Creative Commons, Attribution 4.0 International (CC BY 4.0).
Please note that we are unable to modify the PDF files of articles already published, but we assure that, from this volume onward, each article will have only the correct license clearly indicated.
Thank you for your understanding and support.
CUHSO Editorial Team