| 1 | For instance, in my other tests, the threhold can as low as 50. | |
| 2 | PCR can amplify DNA from a single cell and while this is not necessary for diagnosis, a certain threshold of sensitivity will be required. | |
| 3 | In a study published in the Bulletin of Experimental Biology and Medicine, 48 volunteers who inhaled oxytocin vapor and then had their fingers pricked lowered their pain threshold by more than half. |