Construct Validation of the Rainbow Model of Integrated Care Measurement Tool in Dutch Primary Care for Older Adults. - OOSTRA, DORIEN L.; NIEUWBOER, MINKE S.; JANSSEN, JEROEN H. M.; RIKKERT, MARCEL G. M. OLDE; VALENTIJN, PIM P.; PERRY, MARIEKE (International Journal of Integrated Care (IJIC), 2023)