Table 6.

Top 20 keywords on research of exosomes in OA.

Rank	Keywords	Counts	Rank	Keywords	Counts
1	exosomes	366	11	knee osteoarthritis	66
2	osteoarthritis	337	12	microRNAs	60
3	mesenchymal stem cells	189	13	apoptosis	59
4	extracellular vesicles	186	14	stromal cells	59
5	inflammation	98	15	chondrocytes	53
6	cartilage	84	16	articular cartilage	52
7	knee	76	17	Stem cells	51
8	expression	74	18	repair	50
9	proliferation	70	19	in-vitro	42
10	regeneration	69	20	cartilage repair	40