APA (7th ed.) Citation

ML, W., CJ, L., K, A., ST, G., & RH, J. (2020). Monitoring chronic headache and medication-overuse headache prevalence in Denmark. Cephalalgia : an international journal of headache, 40(1), 6. https://doi.org/10.1177/0333102419876909

Chicago Style (17th ed.) Citation

ML, Westergaard, Lau CJ, Allesøe K, Gjendal ST, and Jensen RH. "Monitoring Chronic Headache and Medication-overuse Headache Prevalence in Denmark." Cephalalgia : An International Journal of Headache 40, no. 1 (2020): 6. https://doi.org/10.1177/0333102419876909.

MLA (9th ed.) Citation

ML, Westergaard, et al. "Monitoring Chronic Headache and Medication-overuse Headache Prevalence in Denmark." Cephalalgia : An International Journal of Headache, vol. 40, no. 1, 2020, p. 6, https://doi.org/10.1177/0333102419876909.