And while a true number is difficult to reach — not every sick person is tested, for instance, and the cause of a death in the hospital can be clouded by co-morbidities — it is likely that no more than a few hundred people in America, and possibly far fewer, have died of the flu this winter.
One app being tested, for instance, lets users listen to a song for free as long as they share the tune with a friend.
Other eluents have been tested, for instance methanol or isopropanol, but they resulted in poor chromatography or no analyte retention [ 2].
Where specific hypotheses are being tested, for instance in an RCT, the sample size should be discussed, and usually a power calculation reported with sufficient details to allow one to verify the reported sample size.
Numerous suicide genes have already been tested, for instance, Bax [ 21], protein kinase R [ 31], caspase-3 [ 18], the host shut-off protein of herpes simplex virus [ 32], diphtheria toxin A [ 33, 34], and barnase [ 35].
"Manly" men — or men who want to appear that way — are more likely to abuse alcohol and less likely to be tested for H.I.V., for instance.
For instance, patients should be tested for H.I.V. infection before starting the drug, because if someone who is already infected takes Truvada alone, drug-resistant strains of the virus may quickly develop.
Cellphones and their radiation have been tested for many of these properties — for instance, their ability to chemically modify DNA without causing mutations — but evidence linking this form of radiation to such cellular changes remains largely negative.
Each instance was tested for at least five distinct 3-mers to ensure it contained nontrivial information (i.e. not a simple repeat).
These hypotheses should be tested by, for instance, observing the behavior of sex chromosomes during male meiosis.
