@misc{indiciae0c9f6306fcae,
  title = {Comorbidity in depression.},
  author = {D J Kupfer and E Frank},
  year = {2003},
  doi = {10.1034/j.1600-0447.108.s418.12.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/12956816/},
  note = {Source identifier: 12956816}
}