Funding for this research was provided by:
IWT (IWT/SBO 130033)
Article History
First Online: 10 August 2018
Compliance with Ethical Standards
:
: All procedures described in the paper and conducted by the authors involved (SEEN project, propylene glycol project) were in accordance with the ethical standards, were registered, and were only conducted following approval by the relevant ethical boards involved.
: There was no specific funding to write this review. The clinical research activities of Karel Allegaert were facilitated by the agency for innovation by Science and Technology in Flanders (IWT) through the SAFEPEDRUG project (IWT/SBO 130033).
: Kristine Svinning Valeur, Helle Holst, Karel Allegaert declared that there have on conflicts of interest related to this paper and this topic.