Butala, Ankur A Absence of Evidence Versus Evidence of Absence-SAPS-PD. [electronic resource] - The American journal of geriatric psychiatry : official journal of the American Association for Geriatric Psychiatry 10 2018 - 1012-1013 p. digital Publication Type: Editorial; Comment ISSN: 1545-7214 Standard No.: 10.1016/j.jagp.2018.06.009 doi Subjects--Topical Terms: HumansPiperidinesUrea--analogs & derivatives