title: Vitamin D deficiency following Billroth II surgery - How much vitamin D is enough?: a case report.
abstract: BACKGROUND
  Vitamin D deficiency with all its consequences is a global health problem.
  
  
  METHODS
  We reported a 62-year-old Caucasian woman with alcohol-related liver cirrhosis (Child class A) and a medical history of Billroth II surgery. Although she has taken an oral dose of 16 800 IU vitamin D daily for six weeks to normalise her 25-hydroxyvitamin D level the raise was only moderate.
  
  
  CONCLUSIONS
  High-dose oral or parenteral vitamin D therapy is necessary to gain sufficient 25-hydroxyvitamin D serum levels in patients following gastric surgery.
authors.affiliation: Department of Internal Medicine, Division of Endocrinology and Nuclear Medicine, Medical University Graz, Auenbruggerplatz 15, Graz, 8036, Austria. astrid.fahrleitner@medunigraz.at.
authors.forename: Eva
authors.initials: E
authors.lastname: Sampl
authors.forename: Doris
authors.initials: D
authors.lastname: Wagner
authors.forename: Claudia
authors.initials: C
authors.lastname: Friedl
authors.forename: Harald
authors.initials: H
authors.lastname: Dobnig
authors.forename: Astrid
authors.initials: A
authors.lastname: Fahrleitner-Pammer