Abstract
Oliveira R, Neves-Costa A, Pedroso D, et al. CLOCK gene circannual expression in cluster headache. Cephalalgia 2024; 44(4). DOI: 10.1177/03331024241247845.
This article has been amended to include acknowledgements.
Dr. Ruth Geraldes, Dr. Raquel Gil-Gouveia, and Dr. Luis Filipe Moita conceived the original study concept, with Dr. Luis Filipe Moita securing project funding.
Dr. Isabel Pavão Martins and Dr. Elsa Parreira played a pivotal role in conceptualizing and drafting the initial study protocol, alongside Dr. Raquel Gil-Gouveia and Dr. Luis Filipe Moita. Dr. Isabel Pavão Martins additionally recruited and included patients from the Hospital da Santa Maria Headache Clinic, and Dr. Inês Brás Marques assisted with the initial setup of the study at Hospital da Luz Lisboa.
The article has been corrected.