TABLE 1.

Sampling information and DNA concentrations of the samples determined by PicoGreen assay

Assay	Sampling dates	Sample IDa	Airflow (liters/min) (start–end)	[DNA] (pg/m3)	Mean	SD (% relative SD)
A	2–9 December 2015	A1	10.00–10.00	34.78	19.19	15.59 (81.24)
		A2	10.00–8.50	3.60
B	9–16 December 2015	B1	9.70–9.20	59.98	48.46	11.52 (23.77)
		B2	9.70–9.70	36.94
C	16–23 December 2015	C1	9.50–9.40	54.80	67.33	12.53 (18.61)
		C2	9.50–9.60	79.85
M	20–27 July 2015	M0	9.50–9.60	271.20

^aID, identifier.