Because histories of tested horses are not well known, determining precisely when and where horses became infected is difficult.
(NASA has a history of testing rovers in Death Valley).
While there is "a long global history" of testing humans in many countries to see how human flu strains shift each year, there are "major gaps" in testing pigs, Dr. Bridges said.
As their use grew in the United States, researchers fiercely debated whether they were putting too much of a premium on academic skills, according to "The Big Test: The Secret History of the American Meritocracy" by Nicholas Lemann (Farrar Strauss & Giroux, 1999), a history of testing.
There is a long history of testing for internal validity, but external validity assessments are more limited, and tend to be focused on small samples.
She had a known history of testing positive for purified protein derivative and also had a positive QuantiFERON-TB Gold test result, which would suggest a mycobacterial infectious etiology.
But providers did not apply triage based on matters of personal HIV risk or history of testing.
42% (37 of 88 patients) and 12% (12/102) of urban and rural residents, respectively reported previous history of testing (χ2 = 22.6, P < 0.001).
The Demographic section of the survey included questions about the participant's age, education, occupation, relationship status, children, source of health information, history of testing for sexually transmitted infections (STIs) and HIV, and circumcision status.
Strafach has a long history of testing and tinkering with iPhone security — he was jailbreaking iPhones while still in high school.
