Please cite use of PhenX protocols in your presentations and publications as:
Protocols incorporated in this study were selected from the PhenX Toolkit version
May 27, 2021, Ver 39.0 .
DD = Data Dictionary
DCW = Data Collection Worksheet
Sly, D., et al. The Florida "truth" anti-tobacco media evaluation: Design, first-year results, and implications for planning future state media evaluations. TOB CONTROL, 2001