Dr. Robert Lehmberg poses in a hallway at the Little Rock, Ark., Veterans Hospital Tuesday, April 29, 2008. Lehmberg says he has battled depression and long considered suicide "an exit strategy if absolutely necessary." About 300 or more U.S. doctors kill themselves each year. Doctors are particularly susceptible to the stubborn stigma of mental illness. Many fear admitting psychiatric problems could be professional suicide, so they suffer in silence. (AP Photo/Danny Johnston)

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