Table 2 Size and location of oral mucosal biopsy used in COMET

[13]

2–3

NA

[14]

9

Buccal mucosa

[15]

2–3

NA

[16]

3–5

NA

[17]

2–3

NA

[18]

NA

NA

[19]

50.24^a

Buccal mucosa (inferior)

[20]

36

NA

[21]

36

Buccal mucosa

[22]

8

Buccal mucosa

[23]

50.24^a

Buccal mucosa (inferior)

[24]

NA

NA

[25]

NA^c

NA

[26]

9

Buccal mucosa (cheek)

[27]

50.24^a

Inferior buccal mucosa

[28]

36

Buccal mucosa

[29]

9.42^b

Buccal mucosa

[30]

9.42^b

Buccal mucosa

[31]

4.71^c

Buccal mucosa (cheek, 20 mm behind the angle of the mouth)

[32]

3–5

Buccal mucosa (inferior)

[33]

100

Buccal mucosa

[34]

NA

Labial mucosa (behind the lip)

[35]

120–200

Labial mucosa (inside the inferior lip)

[36]

16

Buccal mucosa (cheek)