Hamajima, N., Tajima, K., Tominaga, S., Matsuura, A., Kuwabara, M., & Okuma, K. (1999). Tea Polyphenol Intake and Changes in Serum Pepsinogen Levels. Jpn J Cancer Res.

Hamajima, Nobuyuki, Kazuo Tajima, Suketami Tominaga, Akira Matsuura, Masayoshi Kuwabara, and Katashi Okuma. "Tea Polyphenol Intake and Changes in Serum Pepsinogen Levels." Jpn J Cancer Res 1999.

Hamajima, Nobuyuki, et al. "Tea Polyphenol Intake and Changes in Serum Pepsinogen Levels." Jpn J Cancer Res 1999.