Funding
This investigator-initiated research is supported by grant WS53232647 from GRAND (Global Research Award for Nicotine Dependence), an independently reviewed competitive grants program funded by Pfizer Inc (USA). Editorial support for the editing of this manuscript was provided by ECLAT Srl. to Mike Coughlan. Support for open access is provided by Università di Catania under the CRUI-CARE Agreement. The funders had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.