Critique of a medical research paper

I have assignment to write critique of a medical research, I have picked two researches and you only need to choose one research that is easier for you.

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The critique needs to be in medical or clinical way

I just need one paper single space 12 font 

below are links for the two researches

1.  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4262831/

2.  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3356951/

Critique of a medical research paper