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[2] Stephen Gill. What are the different types of headaches? Retrieved on the 7th of May, 2025.
[3] My.clevelandclinic.org. Headaches. Retrieved on the 7th of May, 2025.
[4] Christina Bhattacharya. 7 Common Types of Headaches and How to Fight Them. Retrieved on the 7th of May, 2025.