There was a recent publication on this subject in the American Journal of Clinical Pathology (<a href="http:&#x2F;&#x2F;news.rice.edu&#x2F;2015&#x2F;11&#x2F;17&#x2F;blood-test-results-vary-from-drop-to-drop-in-finger-prick-tests&#x2F;" rel="nofollow">http:&#x2F;&#x2F;news.rice.edu&#x2F;2015&#x2F;11&#x2F;17&#x2F;blood-test-results-vary-from...</a>):<p>&gt; Bond and Richards-Kortum found that averaging the results of the droplet tests could produce results that were on par with venous blood tests, but tests on six to nine drops blood were needed to achieve consistent results.