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Cottonwood Heights police are seeking a man who has been missing more than a week.

Robert Miller, 60, was last seen Jan. 4 at his home near the mouth of Big Cottonwood Canyon.

"He had been on a new course of medication the last couple weeks, and I think that exacerbated the situation," said Paul Durham, who said he has been a friend of Miller's since they were LDS missionaries in Germany.

Miller was being treated for sarcoidosis, Durham said. The condition causes inflammation in the lymph nodes, lungs, liver, eyes, skin or other tissues. Doctors said the condition was treatable, but Durham does not know how the medication impacted Miller and if he completely realized he was walking away from his home. Miller did not drive.

Cottonwood Heights Assistant Police Chief Paul Brenneman said the department has issued an endangered person advisory for Miller but also has considered the possibility Miller may be dead.

"There was some concern of suicide by the family, and we think that's what it is," Brenneman said.

Durham acknowledged Miller had discussed suicide but said friends, family and police still need to be looking for him.

"You just don't know," Durham said. "I'm hoping he's going to call from Palm Desert, Calif., and say, 'What's going on?' "

How to help

Anyone with information regarding Robert Miller's whereabouts can contact Cottonwood Heights police by calling 801-840-4000. Miller, 60, is described as white, 5 feet 6 inches tall, 135 pounds, with hazel eyes and gray or white hair.