Table 2.

Grading scheme used to score the quality of data for manuscripts included in this systematic review, modified from a previously devised scoring system (34).

Evidence gradea (EG)	For FCGS treatment outcome being measured
A	Histology
B	Semi-quantitative scoring system of lesion gross appearance and/or owner-reported clinical signs
C	Subjective outcome measures of lesion gross appearance and/or owner-reported clinical signs without a defined semi-quantitative scoring system

^aIf a combination of outcome types were reported, the higher evidence grade was assigned (A > B > C).