1.
Khan Z ullah, Malik KZ. CHRONIC MAXILLARY SINUSITIS, AN UNCOMMON AETIOLOGICAL FACTOR OF HEADACHE. PAFMJ [Internet]. 2006 Jun. 30 [cited 2024 May 2];56(2):138-42. Available from: https://pafmj.org/PAFMJ/article/view/1507