Short title: Prodromes of HAE
Declarations/Grants: ILN received the Stanley Steyer Graduate Scholarship Fund, Tel Aviv University and CSL Behring Fellowship Fund
No conflict of interest declared
Acknowledgments: We thank our colleagues from other HAE centers in Israel and the Israeli HAE patient organization (E.D.E.M.A) for their collaboration. We thank Mr. Dov Har-Even of Bar-Ilan University, for his excellent guidance and diligent statistical evaluation.