**Data Files**
In the row.per.participant zipped folder, allds includes all the participants, allok includes all the participants who were not excluded.
The row.per.participant.simple zipped folder includes only the variable relevant for the main analyses reported in the supplement materials. It includes an xlsx file which is the codebook that explains the variable names.
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**Analysis scripts**
The sas file is an early script created at about 2008 (when the study was conducted). The R file has been created earlier than the Rmd file, which is currently the last file created for processing and analyzing the data.