From Headache to Altered Consciousness: Headache Attributed to Hypoxia and/or Hypercapnia in a Smoker With Undiagnosed Chronic Obstructive Pulmonary Disease

Tatsuya Tanaka; Nao Furusho; Hirotoshi Kawashima; Tadasu Okaya; Akira Matsuno; Tatsuya Tanaka; Nao Furusho; Hirotoshi Kawashima; Tadasu Okaya; Akira Matsuno

doi:10.7759/cureus.71892

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