concerns, including nutrition and homeopathy. They also published related books: My Learning Child, My Spiritual Child and My Healthy Child. Significant portions of her book about Kathleen Cavendish, Marchioness of Hartington appeared without attribution or permission in The Fitzgeralds and the Kennedys: An American Saga (1987), by historian Doris Kearns Goodwin. Goodwin eventually resolved the matter with a public apology to McTaggart and a "substantial" monetary settlement. Criticism McTaggart has been described as anti-vaccinationist. Beliefs of this nature have been published in What Doctors Don't Tell You and in other publications. This has drawn significant criticism of her work and has created controversy, with her ideas being described by some as pseudoscience. What Doctors Don't Tell You has been cited for factual errors in its attacks on medicine, such as confusing the antiviral drug Tamiflu for a vaccine and attributing deaths to a nonexistent avian influenza vaccine. Ben Goldacre has described McTaggart as "viciously, viciously anti-vaccine" and notes that "In a radical move, even for the vaccine fear-mongering community, this time she has people dying from a vaccine that doesn’t actually exist". The Field has been characterized by Mark Henderson of The Times as pseudoscience, focusing on her personal understanding of quantum physics as a misconception. McTaggart was reported to have threatened to sue Simon Singh after he contacted Comag, the distributors of WDDTY, complaining that the magazine was "largely unscientific" and "promoting advice that could potentially harm readers." "Also, many of the adverts appear to make pseudoscientific and unsubstantiated claims," he said. "I even offered to meet with Comag and introduce them to medical experts, but they have not accepted this invitation. When I suggested that I would blog about our email exchange, their reaction was to tell me in no uncertain terms: 'I should inform you that we have sought legal advice in respect of this matter. We would take any attempts to damage our reputation on social media or elsewhere very seriously.'" In the months between first publication of What Doctors Don't Tell You in magazine form, and February 2013, 54 breaches of the Code of Advertising Practice in 11 adverts were adjudicated and upheld by the Advertising Standards Authority along with a further 11 informally resolved cases, concerning adverts in the first two issues, with more breaches in subsequent issues too. In an interview on BBC Radio 4, GP and author Margaret McCartney stated: "I'm astounded