What are the highest yield organ systems/topics? I was planning on leaving the highest yield/most likely to forget topics for my last week of studying. I am assuming that majority of questions on step 1 are heme-onc, cardio, and neuro but not sure if that's true. I was also planning to leave embryo and biochem until the end because those are topics I am likely to forget. I will obviously be looking at these subjects before that time but just trying to plan my last pass through First Aid.