Reported barriers to evaluation in chronic care: experiences in six European countries

Cécile Knai, Ellen Nolte, Matthias Brunn, Arianne Elissen, Annalijn Conklin, Janice Pedersen Pedersen, Laura Brereton, Antje Erler, Anne Frølich, Maria Flamm, Birgitte Fullerton, Ramune Jacobsen, Robert Krohn, Zuleika Saz-Parkinson, Bert Vrijhoef, Karine Chevreul, Isabelle Durand-Zaleski, Fadila Farsi, Antonio Sarría-Santamera, Andreas Soennichsen