Äldre i riskzon

"Elderly persons in the risk zone" is a health-promoting and preventive intervention study. The intention was that the study group should comprise a representative sample of...“风险区域老年人群”（Elderly persons in the risk zone）是一项健康促进与预防性干预研究。本研究的设计初衷为，其研究队列应涵盖具有代表性的……样本。