Both men agreed to provide samples but complained at being bracketed with serious offenders such as rapists and murderers.

BBC: A DNA autoradiogram

According to ITF statistics, Tipsarevic was among the minority of players who had to provide samples both in competition and outside of it in 2012.

CNN: Tennis is a 'clean sport,' says Tipsarevic

He and five of his family members have traveled to Baton Rouge to provide DNA samples.

CNN: 'My momma's body is on the roof'

With searchers finding many more body parts than bodies, officials urged family members missing loved ones to provide DNA samples to help identify the victims.

CNN: Somber Manhattan back at work

This agreement, which stipulates that countries which provide virus samples should also receive the benefits of research, was preceded by four years of rancorous debate.

ECONOMIST: Flu research and public safety

The preserved timber means that tree ring samples will provide dendrochronological dating for Roman London, expected to be earlier than the current dating of AD 47.

BBC: 'Entire streets' of Roman London uncovered in the City

Most have been samples to demonstrate that NanoOpto can ultimately provide the best integrated components for the cheapest price.

FORBES: Magazine Article

As well as helping to identify Martian meteorites, the analysis of these samples, whose composition is known beforehand, will also provide clues as to how the process of re-entry affects a meteorite's chemical make-up.

ECONOMIST: Meteorites

At the health department, they were told that all the shareholders of the company would have to provide chest X-rays, and, in the most surreal demand of all, stool samples.

FORBES: The Greek Problem: It's the Supply Side

But to provide more detail on how it spreads, they also included genetic information on the virus taken from 100 samples.

BBC: Spread of hepatitis C pinpointed