Medication overuse headache in Scandinavia--comments and questions.
Gunther
G
Haag
Michael-Balint
MB
Klinik
R
R
Jensen
L
L
Bendtsen
D051271:Headache Disorders, Secondary / Q000453:epidemiology*; D006801:Humans; D012537:Scandinavian and Nordic Countries / Q000453:epidemiology