Top Urgency

A doctor answers his phone and hears the familiar voice of a colleague on the other end of the line. 

"We need a fourth for a round of bridge," said the friend. 

I'll be right over," whispered the doctor. 

As he was putting on his coat, his wife asked, "Is it serious?"

"Oh yes, quite serious," said the doctor gravely. 

"In fact, there are three doctors there already!"

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