Harrington voluntarily closed his offices in Tulsa and suburban Owasso and is cooperating with investigators, said Kaitlin Snider, a spokeswoman for the Tulsa Health Department.
7,000 HIV tests urged in Okla. after filthy dental practice found in upscale area →
"It's uncertain how long those practices have been in place," Snider said. "He's been practicing for 36 years."
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