User talk:Yhc1973

December 2008
Welcome to Wikipedia. The recent edit you made to Attention-deficit hyperactivity disorder has been reverted, as it appears to be unconstructive. Use the sandbox for testing; if you believe the edit was constructive, please ensure that you provide an informative edit summary. You may also wish to read the introduction to editing. Thank you. Alansohn (talk) 03:27, 15 December 2008 (UTC)