Hernigou, Philippe http://orcid.org/0000-0002-8475-279X
Article History
Received: 26 September 2020
Accepted: 29 September 2020
First Online: 9 October 2020
Compliance with ethical standards
:
: The author declares that he has no conflict of interest.
: This is a history paper.
Free to read: This content has been made available to all.