Bigal ME, Gladstone J. The metabolic headaches. Current Pain Headache Rep 2008; 12: 292-295.

10.1.1 High-altitude headache
Appenzeller O. Altitude headache. Headache 1972; 12: 126-129.

Burtscher M, Mairer K, Wille M, Broessner G. Risk factors for high-altitude headache in mountaineers. Cephalalgia 2011; 31: 706-711.

Clarke C. Acute mountain sickness: medical problems associated with acute and subacute exposure to hypobaric hypoxia. Postgrad Med J 2006; 82: 748-753.

Ginsberg MD. Carbon monoxide intoxication: clinical features, neuropathology and mechanisms of injury. J Toxicol Clin Toxicol 1985; 23: 281-288.

Heckerling PS, Leikiin JB, Maturen A, Perkins JT. Predictors of occult carbon monoxide poisoning in patients with headache and dizziness. Ann Intern Med 1987;107:174-176.

Jafarian S, Gorouhi F, Lotfi J. Reverse association between high-altitude headache and nasal congestion. Cephalalgia 2007; 27: 899-903.

Lipton RB, Mazer C, Newman LC, Solomon S. Sumatriptan relieves migraine-like headaches associated with carbon monoxide exposure. Headache 1997; 37: 392-395.

Porcelli J, Gugelchuk G. A trek to the top: A review of acute mountain sickness. J Amer Osteopath Assoc 1995; 95: 718-720.

Serrano-Dueñas M. High-altitude headache. Expert Rev Neurother 2007; 7: 245-248.

Schoonman GG, Sándor PS, Agosti RM, Sicoli M, et al. Normobaric hypoxia and nitroglycerin as trigger factors for migraine. Cephalalgia 2006; 26: 816-819.

Silber E, Sonnenberg P, Collier DJ, Pollard A, Murdoch DR, Goadsby PJ. Clinical features of headache at altitude: a prospective study. Neurology 2003; 60: 1167-1171.

Wilson MH, Newman S, Imray CH. The cerebral effects of ascent to high altitudes. Lancet-Neurol 2009; 8: 175-191.

10.1.2 Headache attributed to aeroplane travel
Berilgen MS, Mungen B. Headache associated with airplane travel: report of six cases. Cephalalgia 2006; 26: 707-711.

Berilgen MS, Mungen B. A new type of headache. Headache associated with airplane travel: preliminary diagnostic criteria and possible mechanisms of aetiopathognesis. Cephalalgia 2011; 31: 1266-1273.

Mainardi F, Lissotto C, Maggioni F, Zanchin G. Headache attributed to airplane travel (“Airplane headache”). Clinical profile based on a large case series. Cephalalgia 2012; 32: 592-599.

10.1.3 Diving headache
Cheshire WP, Ott MC Jr. Headache in divers. Headache 2001; 41: 235-247.

Di Fabio R, Vanacore N, Davassi C, Serrao M, Pierelli F. Scuba diving is not associated with high prevalence of headache: a cross-sectional study in men. Headache 2012; 52: 385-392.

Edmonds RC, Greene ER, Schoene RB, et al. Diving and subaquative medicine. 3rd Ed. Oxford: Butterworth-Heinemann 1992: 404-406.

Englund M, Risberg J. Self-reported headache during saturation diving. Aviat Space Environ Med 2003; 74: 236-241.

Sliwka U, Kransney JA, Simon SG, et al. Effects of sustained low-level elevations of carbon dioxide on cerebral blood flow and autoregulation of the intracerebral arteries in humans.
Aviat Space Environ Med 1998; 69: 299-306.

10.1.4 Sleep apnoea headache
Aldrich MS, Chauncey JB. Are morning headaches part of obstructive sleep apnea syndrome? Arch Intern Med 1990; 150: 1265-1267.

Alberti A, Mazzotta G, Gallinella E, et al. Headache characteristics in obstructive sleep apnea syndrome and insomnia. Acta Neurol Scand 2005; 111: 309-316.

Chen PK, Fuh JL, Lane HY, Chin PY, Tien HC, Wang SJ. Morning headache in habitual snorers: frequency, characteristics, predictors and impacts. Cephalalgia 2011; 31: 829-836.

Greenough GP, Nowell PD, Sateia MJ. Headache complaints in relation to nocturnal oxygen saturation among patients with sleep apnea syndrome. Sleep Med 2002; 3: 361-364.

Goksan B, Gunduz A, Karadeniz D, et al. Morning headache in sleep apnoea: clinical and polysomnographic evaluation and reponse to nasal continuous positive airway pressure. Cephalalgia 2009; 29: 635-641.

Kristiansen HA, Kvaerner KJ, Akre H, et al. Tension-type headache and sleep apnea in the general population. J Headache Pain 2011; 12: 63-69.

Kristiansen HA, Kvaerner KJ, Akre H, Overland B, Sandvik L, Russell MB. Sleep apnea headache in the general population. Cephalalgia 2012; 32: 451-458.

Loh NK, Dinner DS, Foldvary DO, Skobieranda F, Yew WW. Do patients with obstructive sleep apnea wake up with headaches? Arch Intern Med 1999; 159: 1765-1768.

Luchesi LM, Speciali JG, Santos-Silva R, et al. Nocturnal awakening with headache and its relationship with sleep disorders in a population sample of adult inhabitants of Sao Paulo City, Brazil. Cephalalgia 2010; 30: 1477-1485.

Mitsikostas DD, Vikelis M, Viskos A. Refractory chronic headache associated with obstructive sleep apnoea syndrome. Cephalalgia 2008; 28: 139-143.

Ozge A, Ozge C, Kaleagasi H, et al. Headache in patients with chronic obstructive pulmonary disease: effects of chronic hypoxemia. J Headache Pain 2006; 7: 37-43.

Poceta JS, Dalessio DJ. Identification and treatment of sleep apnea in patients with chronic headache. Headache 1995;35:586-589.

10.2 Dialysis headache
Antoniazzi AL, Bigal ME, Bordini CA, Speciali JG. Headache associated with dialysis. The IHS criteria revisited. Cephalalgia 2003; 23: 146-149

Gksel BK, Torun D, Karaca S, et al. Is low blood magnesium level associated with hemodialysis headache? Headache 2006; 46: 40-45.

Antonazzzi AL, Corrado AP. Dialysis headache. Curr Pain Headache Rep 2007; 11: 297-303.
Jameson MD, Wiegmann TB. Principles, uses, and complications of hemodialysis. Medical Clinics of North America 1990; 74: 945-960.

10.3 Headache attributed to arterial hypertension
Dodick DW. Recurrent short-lasting headache associated with paroxysmal hypertension: a clonidine-responsive syndrome. Cephalalgia 2000; 20: 509-514.

Gipponi S, Venturelli E, Rao R, et al. Hypertension is a factor associated with chronic daily headache. Neurol Sci 2010; 31 Suppl 1: 171-173.

Furlan JC. Headache attributed to autonomic dysreflexia. Neurology 2011; 77: 792-798.

Gus M, Fuchs FD, Pimentel M, Rosa D, Melo AG, Moreira LB. Behavior of ambulatory blood pressure surrounding episodes of headache in mildly hypertensive patients. Arch Intern Med 2001; 161: 252-255.

Kruszewski P, Bieniaszewski L, Neubauer J, Krupa-Wojciechowska B. Headache in patients with mild to moderate hypertension is generally not associated with simultaneous blood pressure elevation. J Hypertension 2000; 18: 437-444.

Lance JW, Hinterberger H. Symptom of pheochromocytoma with particular reference to headache, correlated with catecholamine production. Arch Neurol 1976; 33: 281-288.

Land SH, Donovan T. Pre-eclampsia and eclampsia headache: classification recommendation [letter]. Cephalalgia 1999; 19: 67-69.

Loh KC, Shlossberg AH, Abbott EC, Salisbury SR, Tan MH. Phaeochromocytoma: a ten-year survey. Quart J Med 1997; 90: 51-60.

Mannelli M, Ianni L, Cilotti A, Conti A. Pheochromocytoma in Italy: A multicentric retrospective study. Eur J Endocrinol 1999; 141: 619-624.

Thomas JE, Rooke ED, Kvale WF. The neurologists experience with pheochromocytoma. JAMA 1966; 197: 754-758.

Vaughan CJ, Delanty N. Hypertensive emergencies. Lancet 2000; 356: 411-417.

Walker JJ. Pre-eclampsia. Lancet 2000; 56: 1260-1265.

Weiss NS. Relation of high blood pressure to headache, epistaxis, and selected other symptoms.
The United States Health Examination Survey of Adults. NEJM 1972; 287: 631-633.
Zampaglione B, Pascale C, Marchisio M, Cavallo-Perin P. Hypertensive urgencies and emergencies. Prevalence and clinical presentation. Hypertension 1996; 27: 144-147.

10.4 Headache attributed to hypothyroidism
Airaghi L, Catania A. Endocrine headache. In: Seminars in headache management. Neuroendocrinological aspects of headache, vol 4, number 4. BC Decker Inc 1999: 1-15.
Amy JR. Tests of thyroid function in chronic headache patients. Headache 1987; 27: 351-353.

Arafah BM, Prunty D, Ybarra J, Hlavin ML, Selman WR. The dominant role of increased intrasellar pressure in the pathogenesis hypopituitarism, hyperprolactinemia, and headache in patients with pituitary adenomas. J Clin Endocrinol Metab 2000; 85: 1789-1793.

Fenichel NM. Chronic headache due to masked hypothyroidism. Ann Intern Med 1948; 29: 456-460.

Levy MJ, Matharu MS, Meeran K, et al. The clinical characteristics of headache in patients with pituitary tumours. Brain 2005; 128: 1921-1930.

Moreau T. Headache in hypothyroidism. Prevalence and outcome under thyroid hormone therapy. Cephalalgia 1988; 18: 687-689.

10.5 Headache attributed to fasting
Dalton K. Food intake prior to migraine attacks. Study of 2,313 spontaneous attacks. Headache 1975; 15: 188-193.

Dexter JD, Roberts J, Byer JA. The five hour glucose tolerance test and effect of low sucrose diet in migraine. Headache 1978; 18: 91-94.

Malouf R, Brust JCM. Hypoglycemia: causes, neurological manifestations, and outcome. Ann Neurol 1985; 17: 421-430.

Mosek, AC, Korczyn, A.D. Yom Kippur Headache. Neurology 1995; 45: 1953-1955.
Pearce J. Insulin induced hypoglycaemia in migraine. J Neurol Neurosurg Psychiat 1971; 34: 154-156.

Service FJ. Hypoglycemic disorders. In: Wyngaarden JB, Smith LH, Bennett JC, eds. Cecil’s textbook of medicine, 18th ed. Philadelphia: WB Saunders 1992: 1310-1317.

10.6 Cardiac cephalalgia
Blacky RA, Rittlemeyer JT, Wallace MR. Headache angina. Am J Cardiol 1987; 60: 730.

Chen SP, Fuh JL, Yu WC, et al. Cardiac cephalalgia: case series and review of the literature with new ICDH-II criteria revisited. Eur Neurol 2004; 24: 231-234.

Bowen J, Oppenheimer G. Headache as a presentation of angina: reproduction of symptoms during angioplasty. Headache 1993; 33: 238-239.

Fleetcroft R, Maddocks JL. Headache due to ischaemic heart disease. J Roy Soc Med 1985; 78: 676.

Grace A, Horgan J, Breathnach K, Staunton H. Anginal headache and its basis. Cephalalgia 1997; 17: 195-196.

Gutiérrez-Morlote J, Pascual J. Cardiac cephalalgia is not necessarily and exertional headache: case report. Cephalalgia 2002; 22: 765-766.

Lefkowitz D, Biller J. Bregmatic headache as a manifestation of myocardial ischemia. Arch Neurol 1982; 39: 130.

Lipton RB, Lowenkopf T, Bajwa ZH, Leckie RS, Ribeiro S, Newman LC, Greenberg MA. Cardiac cephalgia: a treatable form of exertional headache. Neurology 1997; 49: 813-816.

Vernay D, Deffond D, Fraysse P, Dordain G. Walk headache: an unusual manifestation of ischemic heart disease. Headache 1989; 29: 350-351.

Wei JH, Wang HF. Cardiac cephalalgia: case reports and review. Cephalalgia 2008: 28: 892-896.