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The authors of a study published in the medical journal The Lancet that said taking hydroxychloroquine to treat coronavirus could be fatal retracted their findings Thursday after multiple reports questioned its data.

The database belonged to a small Illinois company called Surgisphere, which is owned by Dr.

The World Health Organization and several world governments changed their coronavirus policies and resumed trials of hydroxychloroquine because they got questionable data from the company, The Guardian reported Wednesday.

Data the Chicago-based company claims to have obtained from more than a thousand hospitals worldwide formed the basis of scientific articles that led to changes in coronavirus treatment policies in several countries.

The company also influenced the decision by the WHO and other research facilities to halt trials of hydroxychloroquine, which President Trump has touted and took as a precaution against coronavirus.

The medical journal said in a statement Thursday that “there are many outstanding questions about Surgisphere and the data that were allegedly included in this study.”.

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