Citing 'dehydration and exhaustion,' a spokesperson for Andrea Conklin announced Monday that the Quincy dental receptionist will take an extended leave of absence. 'The stress and strain of answering Dr. Taubman's phones all day long has finally taken its toll on Ms. Conklin,' spokesman Chris Vinocur said. 'Andrea is now in the care of her personal physician, who has recommended that she take two months off to regain her strength.' Vinocur denied rumors in last week's National Enquirer that Conklin had checked into a drug-rehabilitation facility. 