You will be presented with a citation segment from the section of a research paper. Classify the intent behind this citation by choosing from one of the following categories:

- Method: Cites the paper for its methodology or procedure.
- Background: Cites the paper to provide background information.
- Result: Cites the paper for its findings or results.

Your answer should be a single word from the following list of options: ["Method", "Background", "Result"]. Do not include any other text in your response.

Citation sentence:

clarified that no association between ApoE and BDNF genotypes has been established (20, 21, 25, 31, 33-35, 37), although it has been suggested that the C270T-T allele is more common among individuals lacking ε4 (19), and the risk of AD conferred by the C270T-T allele is stronger in patients who do not carry ε4 (23).
Background