The father of missing British girl Madeleine McCann returned to work Thursday for the first time since she disappeared in Portugal six months ago.

Gerry McCann returned to Glenfield Hospital in central England as a consultant cardiologist. He said he initially will work half days three times a week.

McCann and his physician wife, Kate, have led a highly publicized campaign to find their daughter, who disappeared a few days before her fourth birthday.

They say she was abducted from a resort in southern Portugal, but Portuguese police have formally identified the couple as suspects.

"We feel we have done everything we can do to establish the search for Madeleine on an ongoing basis and we feel we have the proper infrastructure now in place to find her," Gerry McCann told reporters.

"Unless Madeleine is found, we are not expecting any significant developments in the near future," he said. "I'm very keen to get back in."