I cannot create a summary of the requested article because there is no medical or scientific article titled "When I use a word . . . Pictorial symbols: smileys, emoticons, emojis" in the search results provided. The search results only contain general information about the history of emoticons and emoji from websites dedicated to their explanation and business purposes, not the medical article from The BMJ that you cited. In order to create an accurate and factual summary as per your requirements, I would need access to the article itself.