Well this one seems more rigorous. They monitored concentration in blood for 4 days, they checked viral presence two following days at the end. They don't mention viral load though and I don't know if they have a threshold for cycles in QPCR to estimate that. This kind of paper is not here to say here is the proof it works or it does not work, it is meant to say: this what we had with us, this how we did it, this is the results we observed and whether or not it validates the hypothesis stated.