Hi<br/>What does " impinge on" mean in:<br/>"those within the child’s environment that impinge on and interact with the child in the development of DBD"<br/>(Retrieved from <a href="http://focus.psychiatryonline.org/article.aspx?Volume=2&page=558&journalID=21"><a href='http://focus.psychiatryonline.org/article.aspx?Volume=2&page=558&journalID=21' target='_blank' rel='nofollow'>http://focus.psychiatryonline.org/article.aspx?Volume=2&page=558&journalID=21</a> </a>)?