title: Avoiding introduction of bias in the analysis of the methylation of free circulating DNA.
authors.affiliation: Department of Internal Medicine, Hospital U. Marqués de Valdecilla, IDIVAL University of Cantabria, 39008 Santander, Cantabria, Spain.
authors.forename: Flor M
authors.initials: FM
authors.lastname: Pérez-Campo
authors.affiliation: Department of Internal Medicine, Hospital U. Marqués de Valdecilla, IDIVAL University of Cantabria, 39008 Santander, Cantabria, Spain.
authors.forename: Carolina
authors.initials: C
authors.lastname: Sañudo
authors.affiliation: Department of Internal Medicine, Hospital U. Marqués de Valdecilla, IDIVAL University of Cantabria, 39008 Santander, Cantabria, Spain. Electronic address: rianchoj@unican.es.
authors.forename: José A
authors.initials: JA
authors.lastname: Riancho
mesh_terms: D015982:Bias; D014408:Biomarkers, Tumor / Q000097:blood / Q000302:isolation & purification; D019175:DNA Methylation; D004273:DNA, Neoplasm / Q000097:blood* / Q000302:isolation & purification; D006801:Humans; D009360:Neoplastic Cells, Circulating / Q000378:metabolism*
chemical_list: D014408:Biomarkers, Tumor; D004273:DNA, Neoplasm
keywords: Biomarker; Circulating cell-free DNA; DNA methylation