User talk:93.31.228.160

Hello, I'm RenatUK. I noticed that you added or changed content in an article, Randomized controlled trial, but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so. You can have a look at the tutorial on citing sources. If you think I made a mistake, you can leave me a message on my talk page. Thank you. --Renat (talk) 00:00, 25 January 2021 (UTC)