General and unspecific damping by malignancy of the circadian amplitude of circulating human melatonin? Tarquini B, Cornélissen G, Tarquini R, Perfetto F, Halberg F. Journal Article 1999; 20(1-2): 25-28 PubMed PMID: 11473228 Citation : The circadian rhythm of serum melatonin of 39 cancer patients is compared with that of 28 healthy subjects matched by gender and age. Ea..... Read abstract Full text PDF