Schreiner, A. S., Hayakawa, H., Morimoto, T., & Kakuma, T. (2003). Screening for late life depression: cut‐off scores for the geriatric depression scale and the cornell scale for depression in dementia among japanese subjects. International journal of geriatric psychiatry, 18(6), 498-505. https://doi.org/10.1002/gps.880