### Comment:
It was the last chapter in the book. The paper was heavily criticized because they reconfigured the machine for each test. I am 99% certain but you are the second person to question it so maybe I'm off.

### REPLY:
For a test on a biological sample to run, you need a certain level of signal to noise for a result to be valid. A few drops of blood won’t give you sufficient signal over background for much of anything.

### END.