“Walach, who holds a doctorate in clinical psychology from the University of Basel, Switzerland, told Just The News in an emailed statement that JAMA didn’t specify how he failed “to provide sufficiently convincing evidence” to back his conclusions.

“I would actually also like to see how those conclusions were reached, but I am afraid that there was no solid conclusion,” he told the outlet. Walach pointed to “potential public health implications” as a “key phrase” in the retraction notice that, to him, suggests “the retraction was political, because some people did not like our data.”

https://www.theepochtimes.com/mkt_morningbrief/author-of-retracted-study-on-harm-of-mask-wearing-by-children-says-removal-was-political_3911445.html?