You have been a patient for a very long time and, among many members of the senior staff, our professional concern has developed into the personal variety.

Schlumberger said that under the terms of the agreement, the concern, called Verisys, would develop, manufacture and market the testing systems worldwide.

This concern has developed into a concern with wider issues of gender, family, sexuality, race and class.

In the 1970s and 1980s, concerns developed over the role chlorofluorocarbons play in damaging the ozone layer.

But at some point a concern developed that this was getting out of hand.

The markets have been preoccupied with the overall state of the economy for months, and last week that concern developed into obsessionary overdrive.

This concern developed in the history of Israel's religion school, but the term eventually passed into its present usage.

"However, to keep him under control, I should stay mounted on him through the day unless a more pressing concern develops."

This preserves flexibility if reasonable concerns develop with further experience.

Vladimir Romanov's concerns with the fairness of refereeing developed during this period.