By FlourishOA

By Springer Nature 

By EndNote

By Elsevier.

Resource by Bernard Becker medical library.

By Adeline Boettcher

A publication from the Alliance for Health Policy and Systems Research (WHO) with the Global Health Ethics Unit (WHO).

Published in Advances in Physiology Education Journal.

By Raimo Streefkerk on Scribbr

A Boston-based non-profit.