Table 1 Keywords for databases and the number of search results

PubMed (Advanced search)

(((((((“thyroid storm”[Title/Abstract]) OR Thyroid storm[MeSH Terms]) OR “thyroid crisis”[Title/Abstract]) OR “thyroid crisis”[MeSH Terms]) OR “thyrotoxic crisis”[Title/Abstract]) OR thyrotoxic crisis[MeSH Terms])) AND ((((“diabetic ketoacidosis”[Title/Abstract]) OR “diabetic ketoacidosis”[MeSH Terms]) OR “ketoacidosis”[Title/Abstract]) OR ketoacidosis[MeSH Terms])

Science Direct (Advanced search)

(Thyroid storm OR thyroid crisis OR thyrotoxic crisis) AND (Diabetic ketoacidosis OR ketoacidosis)

Trip (Search)

(Thyroid storm OR thyroid crisis OR thyrotoxic crisis)(Diabetic ketoacidosis OR ketoacidosis)

The Cochrane Library (Advanced search)

Thyroid storm OR thyroid crisis OR thyrotoxic crisis (Title Abstract Keyword) AND Diabetic ketoacidosis OR ketoacidosis (Title Abstract Keyword)

Google Scholar (Advanced search)

allintitle: (Thyroid storm OR thyroid crisis OR thyrotoxic crisis) AND (Diabetic ketoacidosis OR ketoacidosis)

Google Search (Verbatim)

(Thyroid storm OR thyroid crisis OR thyrotoxic crisis) AND (Diabetic ketoacidosis OR ketoacidosis)

Total