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The original was posted on /r/science by /u/Wagamaga on 2024-08-12 08:53:28+00:00.

Original Title: People who use marijuana at high levels are putting themselves at more than three times the risk for head and neck cancers. The study is perhaps the most rigorous ever conducted on the issue, tracking the medical records of over 4 million U.S. adults for 20 years.