**Author details**

Rie Louise Møller Nordestgaard, Malene Roed Spiegelhauer, Tove Havnhøj Frandsen, Caroline Gren, Agnes Tving Stauning and Leif Percival Andersen\*

\*Address all correspondence to: leif.percival.andersen@regionh.dk

The Helicobacter Research Center, Department of Clinical Microbiology 9301, Copenhagen University Hospital (Rigshospitalet), Copenhagen, Denmark
