def checkBarcodes(allClinDict):
    zKey = findProperKey (allClinDict, "bcr_patient_barcode" )
    numClin = getNumPatients(allClinDict)
    for ii in range(numClin):
        if ( allClinDict[zKey][ii].find("_") >= 0 ):
            print " BAD barcode !!! ", ii, allClinDict[zKey][ii]
            sys.exit(-1)