Table 1.

The search strategy and Participant, Index test, Comparison, Outcome, and Study (PICOS).

Participant	#1 (diabetic kidney disease[MeSH Terms]) AND (diabetic nephropathy[MeSH Terms])
Index test	#2 ((exosome[MeSH Terms]) AND (microvesicle[MeSH Terms])) AND (extracellular vesicles[MeSH Terms])
Comparison	None
Outcome	#3 (proteome[MeSH Terms]) AND (proteomics[MeSH Terms])
Study design	None
Search	#1 AND #2 AND #3
Language	English and Chinese
Electronic database	PubMed, Embase, Web of Science and China National Knowledge Infrastructure (CNKI)