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But concerns flared up earlier this year that drug-coated stents might increase the risk of blood clots . With publicity about the availability of such assistance , the volume of such calls might increase appreciably . Individualized heat pumps for heating or cooling homes might increase efficiency and eliminate the need for costly ductwork . Since it was obvious that by giving evidence soldiers and police officers might increase the dangers which they , and indeed their families , have to run , I agreed that they should appear before me under pseudonyms .