Acknowledgments
We would like to acknowledge the contribution of all colleagues that made this special issue possible. Our gratitude also goes to K Lovesey, the Commissioning Editor of Therapeutic Delivery (at the time of planning and compiling the issue), for the help in ensuring that the process of putting this issue together ran smoothly.
Financial & competing interests disclosure
The authors have no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.
No writing assistance was utilized in the production of this manuscript.