Read and write data files
read_dua_file()
Read in raw data file
write_dua_df()
Write DUA approved data set
set_dua_cw()
Function to set data usage agreement data crosswalk
set_dua_level()
Set data restriction level
deid_dua()
Convert identifying variable to unique hash
see_dua_options()
Show DUA crosswalk options
see_dua_level()
Show current DUA restriction level setting
check_dua_restrictions()
Check data frame columns against currently set restrictions
make_dua_template()
Interactive function to create template file