2021 Yes https://onlinelibrary.wiley.com/doi/epdf/10.1111/ina.12920 Su, Chunxiao Asia Experimental Epidemiology Study Ventilation rates Temperature Radon China Climate region Exposure level Indoor radon Influencing factor The indoor radon concentration was related to seasons, climate regions, ventilation,
decoration, and other factors such as soil and outdoor air. Colder seasons, especially in severe colder areas of China, newer decorated buildings, closed windows, and doors were all associated with higher indoor radon concentrations. Variables like climate region and ventilation showed statistical significance in the correlation analysis