Christiansen, J. M., A. M. Meyer, L. Pickert, R. Pfister, and M. C. . Polidori. “Challenges in the Performance of Real-Life Studies in Older Patients: Focus on Long-Term Care Facilities”. Geriatric Care, vol. 8, no. 1, Mar. 2022, doi:10.4081/gc.2022.10384.