4 ms·
Humming produces NO too (http://ajrccm.atsjournals.org/cgi/content/full/166/2/144 http://ajrccm.atsjournals.org/cgi/content/full/166/2/144). Maybe that is why p
by naveensundar 17y ago
Humming produces NO too (http://ajrccm.atsjournals.org/cgi/content/full/166/2/144 http://ajrccm.atsjournals.org/cgi/content/full/166/2/144). Maybe that is why people like humming?