A little over two years ago we created a blog post for fun, called 17 Great Clinical Research Memes. Apparently it was (and still is) a hit, so we decided to get back to searching for some new ones and have 19 new memes for you. Please add any great ones you have in the comments. We hold no copyright ownership to any of these images, in their raw form or with text and thank the individuals who made them for our entertainment.