Table 3. Frequency of occurrence (%) of the findings of the histopathological evaluation of the different groups before and after the application of MSCs on D0 (before) and D82 (after).

Mild group	PI		Epidermal hyperplasia		SDE
	D0	D82	D0	D82	D0	D82
Negative (−)	14.29	28.57	28.57	28.57	28.57	42.86
Mild (+)	71.42	57.14	42.86	71.43	42.86	57.14
Moderate (++)	14.29	14.29	–	–	28.57	–
Severe (+++)	–	–	28.57	–	–	–
Moderate group	PI		Epidermal hyperplasia		SDE
	D0	D82	D0	D82	D0	D82
Negative (-)	14.29	28.57	28.57	28.57	28.57	42.86
Mild (+)	71.42	57.14	42.86	71.43	42.86	57.14
Moderate (++)	14.29	14.29	–	–	28.57	–
Severe (+++)	–	–	28.57	–	–	–
Severe group	PI		Epidermal hyperplasia		SDE
	D0	D82	D0	D82	D0	D82
Negative (-)	–	–	–	16.67	–	–
Mild (+)	33.34	–	16.67	16.67	50	66.67
Moderate (++)	33.33	66.67	50	50	33.33	33.33
Severe (+++)	33.33	33.33	33.33	16.66	16.67	–