Eradication of Helicobacter pylori, as add-on therapy, has a significant, but temporary influence on recovery in chronic idiopathic urticaria: a placebo-controlled, double blind trial in the Polish population - Pawłowicz, Robert; Wytrychowski, Krzysztof; Panaszek, Bernard (Advances in Dermatology and Allergology/Postępy Dermatologii i Alergologii, 2018)