A prognostic model predicted deterioration in health-related quality of life in older patients with multimorbidity and polypharmacy by González-González, AI, Meid, AD, Dinh, TS, Blom, JW, van den Akker, M, Elders, PJM, Thiem, U, De Gaudry, DK, Swart, KMA, Rudolf, H, Bosch-Lenders, D, Trampisch, H-J, Meerpohl, JJ, Gerlach, FM, Flaig, B, Kom, G, Snell, KIE, Perera, R, Haefeli, WE, Glasziou, PP, Muth, C