Table 2. Search strategy in databases.

MeSH: Medical Subject Heading.

Search strategy	Articles
sleeping: "sleep"[MeSH Terms] OR "sleep"[All Fields] OR "sleeping"[All Fields] OR "sleeps"[All Fields] OR "sleep's"[All Fields] type 2 diabetes: "diabetes mellitus, type 2"[MeSH Terms] OR "type 2 diabetes mellitus"[All Fields] OR "type 2 diabetes"[All Fields]	Before filters applied = 105; after filters applied = 45 (filters: articles published in the last 10 years, articles published in the English language, free full text, adults)