{
 "approved_by_author": "\u231b",
 "citation": "Weidner, C. I., Lin, Q., Koch, C. M., et al. (2014). Aging of blood can be tracked by DNA methylation changes at just three CpG sites. Genome Biology, 15, R24.",
 "citations": 973,
 "citations_date": "2026-07-05",
 "clock_name": "weidner",
 "data_type": "DNA methylation",
 "doi": "https://doi.org/10.1186/gb-2014-15-2-r24",
 "journal": "Genome Biology",
 "last_author": "Wolfgang Wagner",
 "model_type": "linear regression",
 "n_features": 3,
 "notes": "Three-site whole-blood epigenetic-age estimator. The sites were selected from Illumina 27K blood profiles, and the final multivariate linear equation was fitted on targeted bisulfite-pyrosequencing beta values from 82 blood samples and validated in 69 independent samples.",
 "platform": [
  "Illumina 27K",
  "bisulfite sequencing"
 ],
 "population": "adults",
 "predicts": [
  "biological age"
 ],
 "research_only": null,
 "species": "Homo sapiens",
 "tissue": [
  "whole blood"
 ],
 "training_target": [
  "chronological age"
 ],
 "unit": [
  "years"
 ],
 "version": "0.5.0",
 "year": 2014
}