I am doing a review of the benefits and limitations to using genetic methods to research humans.

I think the limitations will come from the fact that you need a blood sample.

I'm not sure how to find about how much blood the scientist takes from the person or who is not allowed to participate in such a study.

Any ideas or help?

Thanks

I think genetics methods can also use a saliva, hair or skin samples.

If a person is "not allowed to participate," why would you want to take a sample?

Since this is not my area of expertise, I searched Google under the key words "genetic research" to get this:

http://www.google.com/search?client=safari&rls=en&q=genetic+research&ie=UTF-8&oe=UTF-8

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.

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To find out about the amount of blood samples taken in genetic studies and the eligibility criteria for participation, you can follow these steps:

1. Start by searching for reputable scientific literature on genetic research methods in humans. You can use academic databases like PubMed, Scopus, or Google Scholar.

2. Use keywords such as "genetic research methods," "blood sample size in genetic studies," or "participant eligibility criteria in genetic research" to narrow down your search.

3. Look for review articles or research papers that specifically address the benefits and limitations of using genetic methods in human research. These articles often provide detailed information about the amount of blood required for specific genetic tests or studies.

4. Pay attention to the methodology sections of the selected articles. Researchers usually include information about the sample size and collection procedures, including blood volume taken from participants.

5. Additionally, look for guidelines or ethics documents related to genetic research, such as those provided by regulatory bodies or research organizations. These guidelines often outline the recommended limits for blood sampling in studies involving human participants.

6. You may also want to consult the websites of research institutions or universities that conduct genetic studies. These organizations often have protocols or guidelines that address the amount of blood taken and eligibility criteria for participants.

Remember to critically analyze the information you find and cite credible sources in your review.