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:

The first-round PCR products were used directly in a second round of PCR using primers 2B and F (Hatada et al., 2010; Shibata et al., 2007; Yoshimura et al., 2006, 2010b) for gp120, IN 2F (59-CTGGCATGGGTACCAGCACACAA-39) and IN 2R (39-CCTAGTGGGATGTGTACTTCTGAACTTA-39) for IN, and IN 2F and F for‚Ä¶
Method