1. Discussion Sadeghi Ramin, MD Nuclear Medicine Research Center, Mashhad University of Medical Sciences

2. Importance Is the main part of the article It is the hardest part to prepare. It does not have any pre-defined structure

3. Possible structure Usually begins with the main findings of the research Then giving evidence to support your data Discuss regarding other researches with results contradicting yours Mention limitations In the end conclude What is important regarding your research and what can you add to the previous literature

4. Mentioning the main findings It is recommended to start your discussion with your main findings. Do not merely repeat your results. Mention what results mean There is no predefined structure Sometimes it is better to mention some other studies before your results

10. Previous studies Give the previous studies which support yours Mention their similarities and differences Give the previous studies which contradict yours Give good reasons why Never underestimate this part Studies with different results compared to yours are very important to address

15. Unexpected results Mention unexpected results Give good reason why you get those

17. Study limitations Mention your study limitations Give suggestions for future studies

21. The main advantages of your study Give brief advantages of your study Explain what the study adds to the previous literature

23. Conclusion Many journals ask the authors to conclude in a separate part of the manuscript Give the answer to the research question or propose a theory in a short way Do not give a conclusion which is irrational or is beyond the scope of your study