The wife of U.S. Secretary of State John Kerry has walked out of a Boston rehabilitation hospital after successful treatment for a seizure she experienced earlier this month.

State Department spokesman Glen Johnson said Saturday that doctors expect 74-year-old Teresa Heinz Kerry to complete her recovery at home after some out-patient treatment. She suffered a seizure at the couple's home in Nantucket on July 7.

Johnson previously said the cause of the seizure had not been determined but doctors had ruled out a brain tumor, heart attack or stroke.

Kerry thanked members of the State Department Diplomatic Security Service who first responded when his wife fell ill. She was transferred to two hospitals and ultimately to Spaulding Rehabilitation Hospital for recovery.

The family does not plan to additional comment.

[Associated Press]