In 2001, Berelowitz, one of the co-authors of the paper, said "I am certainly not aware of any convincing evidence for the hypothesis of a link between MMR and autism".[63] The Canadian Paediatric Society,[64] the Centers for Disease Control and Prevention,[9] the Institute of Medicine of the National Academy of Sciences, [10] and the UK National Health Service[11] have all concluded that there is no evidence of a link between the MMR vaccine and autism, and a 2011 journal article described the vaccine–autism connection as "the most damaging medical hoax of the last 100 years".[25]