Evelopment of a Noninvasive Vitamin D Screening Tool

This should be an article critique.
Here is the whole instruction for this assignment:
This research critique includes a summary of a
research study, including specific descriptions about the research design, the data and sample, measurements, and statistical methods. Focus on the
reliability and generalizability of the study; for example, carefully examine the threats to the studyas internal validity. Evaluate the appropriateness of
the usage of Logistic Regression. Prepare a concluding paragraph or section with the major strengths of the study, weaknesses of the study, and
suggestions for improvement in future studies.

Summary: Include the following. Briefly state:
1. The focus of the study
2. The research hypothesis
3. What the dependent variable is and how it was measured
4. What the main independent variable is and how it was measured
5. If there is any covariate, and if so, how each covariate was measured
6. Sample
7. Sampling technique
8. Analytical approach(es)
9. Findings
10. A major conclusion
Critique on method: Discuss briefly how adequately or inadequately threats to the internal validity were addressed. Be sure you include specific names of the types of internal
validity followed by explanations. Discuss the generalizability of the study to the population. For each threat to validity you address, explain how the study could be designed
sounder by addressing it in a better way. Then, evaluate to determine if the data are suited for logistic regression, if all assumptions for logistic regression are met, and if the results
are interpreted appropriately. What are the strengths of the study from a methodological perspective? How could this study be improved?
Conclusion: Provide a paragraph or section summarizing the major strengths of the study, weaknesses of the study, and suggestions for improvements in future studies, with a
major focus on the analytical approach.

Please highlight each part.

The article that I will use for this critique is:
Development of a Noninvasive Vitamin D Screening Tool
Family and Consumer Sciences Research Journal
Judith M. Lukaszuk Aimee D. Prawitz Kirsten N. Johnson Josephine Umoren
Terrence J. Bugno
DOI: 10.1111/j.1552-3934.2011.02107.x

here is the link:
abstract