headache(25) COVID-19(21) Patient(17) Result(15) SARS-CoV-2(14) Characteristics(12) objective(11) Symptom(11) cross-sectional(10) patients(10) COVID-19 patient(10) intensity(8) migraine(8) Anosmia(8) age(7) with COVID-19(6) Analysis(6) Pain(6) patients with COVID-19(6) clinical(6) Hypothesis(6) Activation(6) feature(6) Frequency(6) hospitalisation(5) SARS-COV-2 infection(5) Symptoms(5) pandemic(5) help(5) were assessed(5)