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Table 1
Scoring key for murine knees
Score	Edge	Proteoglycans	Open lacuna	Non-calcified layer	Synovial lining	Blood in cavity	Pannus tongues

0	Smooth	> 90% present	None	> 90% present	1 even	Absent	Absent
1	Rough	> 50% present	Some	> 50% present	< 50% 2 layers	Present	Present
2		< 50% present	Many	< 50% present	> 50% 2 layers
3		< 10% present		< 10% present	2 layers
4					> 2 layers

Milici et al. Arthritis Research & Therapy 2008 10:R14 doi:10.1186/ar2365

Table 1