Read the "multivitamin use and mortality" paper, answer the following questions: 1) What is the research question? 2) What study design is in this study? Is it the best approach? 3) What is the population? Is it appropriate? 4) How was the outcome measured? Do you think they are accurate and complete? 5) How were the exposure status measured? Do you think they are accurate? 6) How do they manage the follow up? 7) What are the main measures of frequency and association? 8) What are the conclusions? 9) Given your opinions regarding the quality of the study in terms of the study design.