LDTs represent thousands of tests manufactured by many hundreds of laboratories, and that does not even include direct to consumer (DTC) identity and ancestry tests.

FORBES: FDA SpyGate -- New Revelations Challenge The New York Times Investigation of Agency "Enemies List," Raise More Questions About the 'Government's Most Dysfunctional Agency'

Although Pietersen himself has denied the speculation, many journalists have stood by it, believing that he intends to focus on Tests and Twenty20 cricket, including the Indian Premier League.

BBC: Cricket World Cup: Kevin Pietersen confirms opener role

But Webber said he was not concerned that the team's preparations would be affected by his lay-off - adding that he would try to attend as many tests as his rehabilitation allowed even before his injury has healed.

BBC: Webber targets return in February

What about citizenship tests before they are allowed to vote, similar to the civic quizzes faced by many immigrants?

ECONOMIST: Charlemagne

Korda insists he has no idea how a banned substance got into his system but many players feel players failing drug tests should receive mandatory bans - a view supported by Rafter.

BBC: News | Tennis | Injury wrecks Rios challenge

Many conditions that produce impaired thinking and feeling are not spotted by traditional medical exams or laboratory tests, so you should not be surprised or overly concerned that there is a disconnect between your symptoms and apparent good health.

CNN: What are the long-term brain effects of Xanax?

But state tests showed the water wasn't contaminated by drilling, and even more confusingly, many of their neighbors reported no problems.

NPR: Cause Of Off-Color, Fetid Water Eludes Pa. Town