Crawford - whose parent company is based in the US - was approached for comment, but the firm referred the BBC to the NHS.
This is not the only surprise in this article.
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BBC紀錄片：暗處的鏡頭——調查中國酒店偷拍影片黑市
In October, official ID photos of around 70,000 users that Discord had gathered from a previous age-verification partnership were likely leaked through a cyber-attack.