Effects of the Inhalation of Negative Air Ions on Heart Rate Variability

2017 ◽  
Vol 7 (2) ◽  
pp. 253-257
Author(s):  
Ja-Young Lee ◽  
Myung-Sun Jang ◽  
Eun-Hye Chae ◽  
Whan-Seok Choi
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