In writing your paper, follow these guidelines. 1) Begin your paper by introducing the problem being investigated. 2) Give a detailed description of the study (why it was done, who conducted it, who the subjects were, what the results showed, and what the authors concluded from the results). 3) After describing the article, you must use critical thinking to analyze it. Critical thinking about epidemiological studies involves determining whether the evidence gathered and described by the authors is appropriate to answer the questions they are trying to answer and whether this evidence supports the conclusions eventually drawn by the authors. This is where you compare and contrast one study to the other study of the set you have chosen. 4) The last portion of the paper should state your conclusions regarding your analysis.