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:

…are required for the normal display of behavioral rhythms in constant conditions—producing short period rhythms or arrhythmicity—and both affect the rhythmicity of cellular pacemaking (VIP: Harmar et al., 2002; Aton et al., 2005; PDF: Peng et al., 2003; Klarsfeld et al., 2004; Lin et al., 2004).
Background