User talk:2601:88:301:1230:10AE:A9BD:92D4:4964

March 2022
Hello, I'm 511KeV. I noticed that you made a change to an article, Willem Einthoven, but you didn't provide a source. I’ve removed it for now, but if you’d like to include a citation to a reliable source and re-add it, please do so! If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thanks. signed, 511KeV    (talk) 15:23, 25 March 2022 (UTC)