We read with great interest the results of “Particulate Matter Exposure and Stress Hormone Levels: A Randomized, Double-Blind, Crossover Trial of Air Purification” by Li et al.1 The authors enrolled… Click to show full abstract
We read with great interest the results of “Particulate Matter Exposure and Stress Hormone Levels: A Randomized, Double-Blind, Crossover Trial of Air Purification” by Li et al.1 The authors enrolled 55 healthy college students in China and used real and sham air purifiers to quantify the serum metabolites. The results suggest that higher particulate matter may …
               
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