Opioid epidemic

Discuss the strengths and weaknesses of each piece.
If the articles talk to each other (that is, if they support or contrast want other), explains how and why 
What does the evidence tell us
Is there another possible explanation you can think of?  Based on what you have read, what is your hypothesis?  In other words, what is your explanation for the findings?
 How can you refine your question or topic even further now that you have described the findings?