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Dr. Arnold Klein's office manager -- who claims he was Michael Jackson's lover -- is facing such intense death threats that he's moving from place to place ... hiding out from angry MJ fans.

Dr. Arnold Klein's office manager -- who claims he was Michael Jackson's lover -- is facing such intense death threats that he's moving from place to place ... hiding out from angry MJ fans.


A 情報源 close to Dr. Klein and Jason Pfeiffer tells TMZ incensed Jackson ファン have walked right up to Pfeiffer's ホーム and knocked on his door -- and they've also tracked him down at his friends' houses.

Since Jason...