1. Department of Civil, Architectural, and Environmental Engineering, The University of Texas at Austin, Austin, Texas 78712-1139, United States of America
2. School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China
3. Department of Building Science, Tsinghua University, Beijing 100084, China
4. Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Tsinghua University, Beijing 100084, China