What happened to Dan Markingson?

@article{Haug2013WhatHT,
  title={What happened to Dan Markingson?},
  author={Charlotte Haug},
  journal={Tidsskrift for den Norske laegeforening : tidsskrift for praktisk medicin, ny raekke},
  year={2013},
  volume={133 23-24},
  pages={2443-4}
}