handle the case in which index has been removed (this is the NoIndex case in HiSeqX)
handle the case in which index has been removed (this is the NoIndex case in HiSeqX)

SciLifeLab/TACA,SciLifeLab/TACA,senthil10/TACA,senthil10/TACA,kate-v-stepanova/TACA,SciLifeLab/TACA,vezzi/TACA,vezzi/TACA,kate-v-stepanova/TACA