@article{BeierlePryssAizawa2023,
  author    = {Felix Beierle and R{\"u}diger Pryss and Akiko Aizawa},
  title     = {Sentiments about mental health on Twitter — before and during the COVID-19 pandemic},
  journal   = {Healthcare},
  volume    = {11},
  number    = {21},
  doi       = {10.3390/healthcare11212893},
  year      = {2023},
}