Table 2.

NOS quality evaluation table.

Study	Selection	Comparability	Outcomes	Total
	1 2 3 4		123
Kenji Ishido	★★★	★	★★★	7
ZitingQu	★★★	★	★★	6
MingyuWan	★★★	★	★★★	7
LiChen	★★★	★	★★	6
EISUKEBOOKA	★★★	★★	★★★	8
MiaomiaoGou	★★★	★★	★★★	8
Dan-YunRuan	★★★	★	★★★	7
Yumiko Ota	★★★★	★	★★★	8
Tsutomu Namikawa	★★★	★★	★★★	8
Takanobu Yamada	★★★★	★	★★★	8
QiuxiaDong	★★★	★★	★★★	8
YidanHou	★★★	★	★★★	7
JiajiaYuan	★★	★	★★★	6
YangChen	★★★	★★	★★★	8
ShigeoTokumaru	★★★	★	★★★	7
Nalee Kim	★★★	★★	★★★	8
Jwa Hoon Kim	★★★★	★★	★★★	9

★ represents the score, and one ★ is one point.