Patient empowerment in young persons with chronic conditions: psychometric properties of the Gothenburg Young Persons Empowerment Scale (GYPES)
M. Acuña Mora; K. Luyckx; C. Sparud-Lundin; M.A.C. Peeters; A.L. van Staa; J.N.T. Sattoe; E.L. Bratt; P. Moons