Effect modification of long-term air pollution exposure on the association of physical activity with COPD hospitalization: a prospective cohort study of 0.5 million Chinese adults
Chen Z., Xia X., Liu C., Niu Y., Meng X., WRIGHT N., KARTSONAKI C., Chen Y., Yang L., DU H., Yu C., Sun D., Lv J., Chen J., Li L., BARNARD M., Kang K., Wu S., Chan P., LAM H., Kan H.