"The Review of Systems domain contains a relevant collection of symptoms and functions systematically gathered by a clinician. It includes symptoms the patient is currently experiencing, some of which were not elicited during the history of present illness, as well as a potentially large number of pertinent negatives, for example, symptoms that the patient denied experiencing. Note: Behavioral health providers do not have additional requirements related to the exchange of review of systems. Implementers are encouraged to use the ReviewOfSystemsSection base standard implementation guidance. For instance if the target implementation is CDA R2, then implementers should reference templates specified in the Consolidated CDA implementation guide." - HL7 Behavioral Health Record DAM R2, Problem.reviewOfSystemsSection