The White House recently issued a press release with links to scientific studies to back up Trump’s claim that use of acetaminophen, commonly referred to as Tylenol, during pregnancy causes autism, but those studies provided only “weak” and “inconclusive”, evidence, according to physicians with expertise in reviewing medical research who spoke to the Guardian.Jeffrey Singer, a surgeon and senior fellow at the Cato Institute who has written about the Tylenol/autism claims, said that the links in the White House press release showed that the claims contained a political spin.The release creates the appearance of extra evidence by linking to the same studies multiple times, Singer said. The most recent study cited – a review paper published this August by authors affiliated with Mount Sinai and Harvard – is made to look like two separate studies, one from Harvard and one from Mount Sinai. A Boston Birth Cohort study authored by Johns Hopkins researchers is also linked twice in the release, as though it is two separate studies.“So you say a Harvard study found the same thing as the Hopkins study and the Mount Sinai study.