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Krogstad, Hilde, Jon Håvard Loge, Kjersti S. Grotmol, Stein Kaasa, Cecilie E. Kiserud, Øyvind Salvesen, och Marianne Jensen Hjermstad. "Symptoms in the General Norwegian Adult Population - Prevalence and Associated Factors." BMC Public Health 2020.

Krogstad, Hilde, et al. "Symptoms in the General Norwegian Adult Population - Prevalence and Associated Factors." BMC Public Health 2020.