User talk:156.203.255.189

April 2022
Hello, I'm Chevvin. I wanted to let you know that one or more of your recent contributions&#32;to ABO blood group system have been undone because they did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the Teahouse. Thanks. — Chevvin 17:44, 2 April 2022 (UTC)