based on the measurements obtained in {HEAD ~ step b}, plotting the alcohol concentration levels for an individual versus time and using computerized techniques to obtain value of the Area Under the Curve for the ascending and descending parts of {TAIL ~ the plotted data} 
based on the measurements obtained in { HEAD ~ step b } , plotting the alcohol concentration levels for an individual versus time and using computerized techniques to obtain value of the Area Under the Curve for the ascending and descending parts of { TAIL ~ the plotted data }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL