Table 6: Estimation of the visual extinction by the 9.7 $\mu$ m optical depth, the near-infrared excess and the SED fitting method.
Method

Source " $\tau_{9.7}$ '' "E(H-K)'' "SED fitting''

LLN 8 >8 <39 ...

LLN 13 >48 <59 60

LLN 17 >13 <46 40

LLN 19 >22 <56 45

LLN 41 >10 <40 ...

**Table 6:** Estimation of the visual extinction by the 9.7 $\mu$ m optical depth, the near-infrared excess and the SED fitting method.
	Method
Source	" $\tau_{9.7}$ ''	"E(H-K)''	"SED fitting''
LLN 8	>8	<39	...
LLN 13	>48	<59	60
LLN 17	>13	<46	40
LLN 19	>22	<56	45
LLN 41	>10	<40	...

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