@misc{indiciae6e4ef0f85259,
  title = {"Difficult-to-treat depression".},
  author = {David J Kupfer and Dennis S Charney},
  year = {2003},
  doi = {10.1016/s0006-3223(03)00188-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/12706948/},
  note = {Source identifier: 12706948}
}