He said more forensic tests needed to be completed and that some witnesses remained to be interviewed.
But structural heart problems often go undiagnosed because the tests needed to find them can be expensive.
Experience has shown that many promising candidates unexpectedly fall by the wayside in the lengthy series of animal and human tests needed to meet federal licensing requirements.
The government's own climate advisers recently published a report suggesting that three tests needed to be met for fracking to proceed safely.
She wrote that tests needed to be administered annually to highlight and shrink the achievement gap between white and black students.
If the department decides to base its tests on walking cattle, the number of tests needed to say the country is disease-free soars.
Parchin is especially significant since the IAEA believes Iran in 2003 ran explosive tests needed to set off a nuclear charge.
The new work now makes it possible to screen thousands of candidate metal-oxide materials without the time-consuming tests needed to prove their exact performance.
In 2001, the Education Ministry ruled that math was not an obligatory part of the series of tests needed to graduate from high school, Professor Turski said.
