@article{EssenSternHaaseetal.2022,
  author    = {Anna Essen and Ariel Dora Stern and Christoffer Bjerre Haase and Josip Car and Felix Greaves and Dragana Paparova and Steven Vandeput and Rik Wehrens and David W. Bates},
  title     = {Health app policy},
  journal   = {npj digital medicine},
  series    = {international comparison of nine countries' approaches},
  volume    = {5},
  number    = {1},
  doi       = {10.1038/s41746-022-00573-1},
  year      = {2022},
}