Nocturnal urinary 6-sulfatoxymelatonin and proliferating cell nuclear antigen-immunopositive tumor cells show strong positive correlations in patients with gastrointestinal and lung cancer.
J Pineal Res. 1997 Sep;23(2):90-6. doi: 10.1111/j.1600-079x.1997.tb00340.x.
J Pineal Res. 1997.
PMID: 9392447