Assessing physical activity, mental health, and quality of life among older adults in Tehran, Iran: A cross-sectional study - Mohammad VaezMousavi; Hadi Nobari; Amir Shams; Hamed Abbasi; Parvaneh Shamsipour-Dehkordi; Fariba Mohamadi; Andrew J. Brinkley; Mahdi Bayati; Lara Carneiro (PLoS ONE, 2025)