Scientists are unsure if stem cells are altered for the worse when grown in the lab.
The trouble is that all three of the conditions have taken a turn for the worse.
In a sense, he has: Bristol-Myers Squibb's fortune has taken a massive turn for the worse.
We already saw changes for the worse with Dead Space 3 over its predecessors.
One of his favourite dictums was that when bands changed, it was usually for the worse.
Things started to turn for the worse around the time Tom DeLay left the House under an ethical cloud.
This time around, the wellness boom seems unlikely to suffer such a nasty turn for the worse.
As the nation ages, the financial landscape is shifting under its feet--and in many ways, it's for the worse.
For instance, suppose that someday your marriage takes a turn for the worse.
Then there are the long-standing challenges that could take a turn for the worse, such as the Israeli-Palestinian conflict.
It was a job, and a night, which dramatically changed the course of Ken Littleton's life for the worse.
History shows it capable of change for the better and for the worse.
And if Europe's economy does look like taking a turn for the worse, they can always change their minds.
He said more would probably have emigrated had job prospects in Europe not taken a turn for the worse.
However, if markets, or the economy, take a sharp turn for the worse, investors may not be so brave.
But if things take another turn for the worse, the big ones could end up back in the water.
U.S. banks remain in recovery mode, which is prone to reversal if the economy takes a turn for the worse.
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This situation has taken a turn for the worse as Greece will apparently not meet its deficit targets this year.
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Things took a turn for the worse after the National Association of Homebuilders reported its July index of builder confidence.
If the world economy takes a turn for the worse, some airlines will no doubt seek to cancel or postpone orders.
Bobby Moore, from the Unite union, said relations between his organisation and the department have taken a turn for the worse.
But if things take a turn for the worse, watch out for shareholder lawsuits, and plenty of trouble along with them.
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But, on Friday, Mount Elizabeth said the patient's health, already "extremely critical" on admission, had taken a turn for the worse.
After the Conservative tax proposals, however, he quickly backed off, as Labour's poll numbers had taken a sudden turn for the worse.
As NPR's John Burnett explains, things have taken a turn for the worse in the life of this young dentist in Baghdad.
But if things take a turn for the worse, watch out for shareholder lawsuits, this person said, or accusations of insider trading.
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This situation has taken a turn for the worse this week as Greece will apparently not meet its deficit targets this year.
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However the club's fortunes have taken a turn for the worse and they are currently rooted to the bottom of the league.
Mr Rodwell said the weather had taken a "turn for the worse" on Friday night, with blizzard conditions even at low levels.
By binding tariffs near to the prevailing rate, a Doha agreement would have stopped policies taking a dramatic turn for the worse.
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