Measurement Properties of the Online EuroQol-5D-Youth Instrument in Children and Adolescents With Type 1 Diabetes Mellitus: Questionnaire Study oleh Mayoral, Karina, Rajmil, Luis, Murillo, Marta, Garin, Olatz, Pont, Angels, Alonso, Jordi, Bel, Joan, Perez, Jacobo, Corripio, Raquel, Carreras, Gemma, Herrero, Javier, Mengibar, Jose-Maria, Rodriguez-Arjona, Dolors, Ravens-Sieberer, Ulrike, Raat, Hein, Serra-Sutton, Vicky, Ferrer, Montse