@article{469,
  author       = {Hirschfeld, Gerrit and Wager, J. and Zernikow, B.},
  issn         = {2167-8359},
  journal      = {PeerJ},
  keywords     = {Chronic pain, Health care utilization, Children and adolescents, Sequential sampling},
  number       = {e916},
  pages        = {1--12},
  title        = {{Physician consultation in young children with recurrent pain - a population-based study}},
  doi          = {10.7717/peerj.916},
  volume       = {3},
  year         = {2015},
}

@article{455,
  author       = {Hirschfeld, Gerrit and Hechler, Tanja and Dobe, Michael and Wager, Julia and von Lützau}, Pia and Blankenburg, Markus and Kosfelder, Joachim and Zernikow, Boris},
  issn         = {1465-735X},
  journal      = {Journal of Pediatric Psychology},
  keywords     = {adolescents, clinical significance, headache, inpatient pain treatment, somatoform pain disorder},
  pages        = {224--236},
  publisher    = {Oxford Univ. Press},
  title        = {{Maintaining Lasting Improvements: One-Year Follow-Up of Children With Severe Chronic Pain Undergoing Multimodal Inpatient Treatment.}},
  doi          = {10.1093/jpepsy/jss115},
  volume       = {38},
  year         = {2012},
}