This study aims to describe the epidemiological features of headaches in patients with COVID-19 infection.

Dear Editor in-chief,rnI am enclosing herewith a manuscript entitled “Perthes syndrome: a case report" for publication in the Tunisian Journal of Emergency Medicine. rnThe corresponding author is Rim KARRAY and contribution of the authors as mentioned below with their responsibility in the research:rn1. Study concept and design: Rim KARRAY rn2. acquisition of the data : kais ben jeddou, hana ksentini, rn3. drafting of the manuscript: Leila chaari, rim karrayrn4. approval of final manuscript: nasri abdennour, noureddine REKIK.rnWith the submission of this manuscript, I would like to undertake that:rn- the research is conforming to the provisions of the Declaration of Helsinki (as revised in Brazil 2013),rn- all authors of this research paper have directly participated in the planning, or analysis of this studyrn- all authors of this paper have read and approved the final version submittedrn- the contents of this manuscript have not been copyrighted or published previouslyrn- the contents of this manuscript will not be copyrighted, submitted or published elsewhere, while acceptance by the journal is under considerationrn- there are no directly related manuscripts or abstracts, published or unpublished, any authors of this paperrn- all authors declare no conflicts of interestsrnBest regards