{
 "approved_by_author": "\u231b",
 "citation": "Hannum, G., et al. \u201cGenome-wide methylation profiles reveal quantitative views of human aging rates.\u201d Molecular Cell 49(2), 359\u2013367 (2013).",
 "citations": 4678,
 "citations_date": "2026-10-02",
 "clock_name": "hannum",
 "data_type": "DNA methylation",
 "doi": "https://doi.org/10.1016/j.molcel.2012.10.016",
 "journal": "Molecular Cell",
 "last_author": "Kang Zhang",
 "model_type": "elastic net regression",
 "n_features": 71,
 "notes": "Whole-blood elastic-net predictor of chronological age from 71 CpG methylation fractions, derived in a 482-person primary cohort and validated in 174 independent participants.",
 "platform": [
  "Illumina 450K"
 ],
 "population": "adults",
 "predicts": [
  "chronological age"
 ],
 "research_only": null,
 "species": "Homo sapiens",
 "tissue": [
  "whole blood"
 ],
 "training_target": [
  "chronological age"
 ],
 "unit": [
  "years"
 ],
 "version": "0.5.7",
 "year": 2013
}