As from 1 October 2020, there will be a new ruling in effect for the number of references in all CardioPulse articles.

References will be limited to a maximum of ten (10) per CardioPulse article and they will be listed online and in print.

This requirement has originated from Oxford University Press, the European Heart Journal publisher.

Conflict of interest: none declared.

Cardio Pulse contact: Andros Tofield, Managing Editor. Email: [email protected]

This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://dbpia.nl.go.kr/journals/pages/open_access/funder_policies/chorus/standard_publication_model)