Impact of Perceived Safety and Barriers on Physical Activity Levels in Community-Dwelling Older Adults During the COVID-19 Pandemic in Singapore: A Cross-Sectional Mixed Methods Study. - De Roza JG; Ng DWL; Wang C; Soh CSC; Goh LJ; Mathew BK; Jose T; Tan CY; Goh KC (Journal of aging and physical activity, 2022)