@oristarA,
Okay. This text is so slight and imprecise, I ask myself why you are interested in it.
Quote:My major is orthopaedic research in Stanford and now. What is discussed in this paper is what is accepted in this field. But we still need more and bigger cohort study.
Here's my take on that. Note, the word "cohort" is seldom seen, and to me seems out of place here.
My major (the principal discipline studied) is orthopaedics, involving research at Stanford University and also here, up to the present time. What is discussed in this paper is what is accepted in this field (mainstream orthodoxy). But we still need more extensive and bigger samples to study, to develop this work.
(Sorry if it seems a bit clunky. And it did need some guesswork on my part.)