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:

Antibodies used in primary reaction and working concentrations were as follows: anti-NF (clone 2F11, reacting with 70-, 160-, and 200-kDa proteins, 0.5 g/ml; DAKO) (21), anti-SR4 (clone N-16; the epitope is located at the N-terminus of human SR4, 0.5 g/ml; Santa Cruz Biotechnology, Santa Cruz, CA) (16), and anti-DLX2 (catalog no. ab18188, 0.5 g/ml; Abcam, Tokyo, Japan) (6, 16, 27) as enteric neural stem cell markers, anti-PCNA (clone PC10; DAKO) as a cell proliferating marker that is specifically expressed in cell nuclei during the S phase (3), and anti-cRET (rabbit polyclonal, 2 g/ml; Assay Biotechnology, Sunnyvale, CA) as a neural crest-derived stem cell marker.
Method