Text and Data Mining valid from 2019-05-16
First Online: 16 May 2019
Compliance with Ethical Standards
: Monica A. Muñoz and Gerald J. Dal Pan have no conflicts of interest to declare.
: No funding was used for the preparation of this letter.
: The views expressed are those of the authors and do not necessarily represent the position of, nor imply endorsement from, the US FDA or the US Government.