Validation of the International Classification of Functioning, Disability and Health (ICF) core set for diabetes mellitus from the patient perspective using focus groups

I. Kirchberger, M. Coenen, F. X. Hierl, C. Dieterle, J. Seissler, G. Stucki and A. Cieza

Diabetic Medicine 26 ( 7 ): 700 - 707 , 2009