AUTHOR=Chen Daniel Tzu-Hsuan TITLE=Dual and poly-use of novel and conventional nicotine and tobacco product use in Europe: Challenges for population health, regulatory policies, and the ways ahead JOURNAL=Frontiers in Public Health VOLUME=11 YEAR=2023 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2023.1093771 DOI=10.3389/fpubh.2023.1093771 ISSN=2296-2565