[Twenty years of Der Schmerz. The early years].
Zimmermann
M
M
D035843:Biomedical Research; D019468:Disease Management; D005858:Germany; D006291:Health Policy; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D010146:Pain / Q000175:diagnosis; D059408:Pain Management; D010506:Periodicals as Topic / Q000266:history*; D014944:World Health Organization