Table 4. HPF counts of inflammatory cells and macrophages in the epithelium of IP

	Grade I	Grade II	Grade III	Grade IV
Inflammatory cells	22.05±13.83*	17.21±12.70*,†	7.97±9.06*,†	0.73±0.79*
Macrophages	2.80±3.44‡	1.80±2.08‡	0.88±0.01‡	0‡

p=0.001 between I+II and III+IV.
p=0.04 between II and III.
p=0.026 between I+II and III+IV using Student’s t-test.
Adopted from Roh et al.⁴⁾ with permission of John Wiley & Sons.