[Differences in the groups of chronic urticaria as explanation of divergent results in the search for etiology].
B M
BM
Henz
T
T
Zuberbier
D002908:Chronic Disease; D005500:Follow-Up Studies; D016481:Helicobacter Infections / Q000150:complications; D016480:Helicobacter pylori; D006801:Humans; D012307:Risk Factors; D013997:Time Factors; D014581:Urticaria / Q000175:diagnosis / Q000209:etiology*