Reads a cohort data file and returns a data frame.
     
    
    Usage
    readCohortData(pathCohortDataFile, delim = ",")
 
    
    Arguments
- pathCohortDataFile
- The path to the cohort data file. 
- delim
- The delimiter used in the cohort data file. 
 
    
    Value
    A data frame containing the cohort data.