1. Migraine and the trigeminovascular system—40 years and counting
2. International Headache Society.International Classification of Headache Disorders (ICHD‐3) 2018.http://www.ichd‐3.org(accessed 26 August 2021).
3. Subarachnoid haemorrhage – can we do better?;Johnson SRD;J R Soc Med,1989
4. National Institute for Health and Clinical Excellence.Diagnosis and management of headaches in young people and adults 2021.http://www.nice.org.uk(accessed 26 August 2021).