You can use all the caps you want, but you're still wrong. It's written poorly to be sure, but you need to do a "close reading."
The abstract can't be any clearer by stating 4 CRs were for bone marrow and peripheral blood, period.
That's not what the abstract means. You've mis-read it. By using the work "period," you show that you've mis-read the abstract.
I see exactly where you've gotten confused--and it's readily explainable by the lousy wording--but if you put the phraseolgy in context, you'll understand the meaning. You've taken the phraseology out its context and, thus, come up with an erroneous reading.