Ravi, Gupta, Manjeet S, Bhatia, and Chhabra Vishal. “CHRONIC DAILY HEADACHE: MEDICATION OVERUSE AND PSYCHIATRIC MORBIDITY”. Journal of Pakistan Psychiatric Society 4, no. 01 (June 30, 2007): 19-24. Accessed October 5, 2024. https://jpps.pk/index.php/journal/article/view/732.