Roar Johnsen

Headache and neck or shoulder pain--frequent and disabling complaints in the general population.

T. Hasvold, R. Johnsen, Roar Johnsen, 1993, Scandinavian journal of primary health care.

Aetiology of peptic ulcer: a prospective population study in Norway.

O. Førde, R. Johnsen, B. Straume, 1994, Journal of epidemiology and community health.

Is Helicobacter pylori the cause of dyspepsia?

L. Bostad, R. Johnsen, B. Straume, 1992, BMJ.

Non-ulcer dyspepsia and peptic ulcer: the distribution in a population and their relation to risk factors.

R. Johnsen, B. Straume, B. Bernersen, 1996, Gut.