McGill University, Colorado State University, Fort Collins, Peking University, Imperial College London - MRC-PHE Centre for Environment and Health, Imperial College London - Department of Epidemiology and Biostatistics, Imperial College London, Imperial College London, Peking University, Tsinghua University - Department of Building Science, Chinese Academy of Medical Sciences, affiliation not provided to SSRN, McGill University, Peking University - Clinical Research Center and McGill University - School of Population and Global Health