@article{KlinsingYalachkovFoerch2021,
  author    = {Svenja Leonie Klinsing and Yavor Vasilev Yalachkov and Christian F{\"o}rch},
  title     = {Difficulty in identification of patients with active secondary progressive multiple sclerosis by clinical classification tools},
  journal   = {European journal of neurology},
  volume    = {29},
  number    = {4},
  pages     = {1100 -- 1105},
  doi       = {10.1111/ene.15227},
  year      = {2021},
}