Not only is testing costly and prone to returning false positives, but it also doesn't address drug dependence or its underlying issues.
It's time for more blood testing — costly or not — in and out of competition; time to adopt the biological passport used in cycling and track and field to monitor baseline levels.
Recruiting difficulties can lead to: responder bias, an insufficient sample size to adequately power statistical analyses for hypothesis testing, costly delays in achieving the research objectives, and as a worst case, early cessation of the research project.
As more women get the HPV vaccine, however, the number of lesions will decline, making the Pap test more costly per cancer case detected.
However, the real pipe test is costly and difficult.
However wheel track test is costly and time consuming and the results obtained from different tests by different researchers were sometimes contradicted.
Part of the problem is that current testing strategies dictate testing for specific diseases, and each test is costly and time consuming.
1 Performing each test is costly and time consuming, and in some countries only a single test may be available for a particular condition.
Early findings are promising, but only part of the colon is screened, the test is costly and invasive, and it has low acceptability: less than 50% of people aged 50 75 years accepted an invitation for screening [ 10].
However, these tests are costly and generally less sensitive than skin tests.
