Self-reported medication information needs among medication users in a general population aged 40 years and above – the Tromsø study oleh Mari J. Walquist, Kristian Svendsen, Beate H. Garcia, Trine S. Bergmo, Anne Elise Eggen, Kjell H. Halvorsen, Lars Småbrekke, Unni Ringberg, Elin C. Lehnbom, Marit Waaseth