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* Medical products maker Radiance Medical Systems Inc. agreed to merge with privately held Endologix Inc., a maker of minimally invasive treatments for vascular diseases, for about $8.4 million in cash and stock. The companies, both based in Irvine, said Radiance will pay 75 cents in cash and one share of its stock for each of the 11.1 million Endologix shares it doesn’t already own.

Radiance holds a 4% stake in Endologix.

Shares of Radiance, which have dropped 75% in the last year, closed off 3 cents at $1.70 on Nasdaq.