A brief author note (which should not be included in papers submitted in Paul Rose’s classes) goes here. It may include acknowledgment of funding sources, expressions of gratitude to research assistants and contact information for the author who will handle requests. I have a few notes of my own to share here. First, I am very grateful to everyone who has emailed me with suggested improvements; I’m sorry I can’t acknowledge you all here. Second, you are hereby granted permission to use this document for learning and research purposes. You may not sell this document either by itself or in combination with other products or services. Third, if you use this document, you use it at your own risk. The document’s accuracy and safety have been thoroughly evaluated, but they are not guaranteed.