Functional Vitamin B12 Deficiency Represented by Elevated Urine Methylmalonic Acid Levels in Patients with Migraine

Osman Metin IPCIOGLU, Omer OZCAN, Mustafa GULTEPE, Hakan TEKELI and Mehmet Guney SENOL

Turkish Journal of Medical Sciences 38 ( 5 ): 409 - 414 , 2008