Critique of a medical research

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.

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/