Table 2.

Methodology

Methodology of guidelines	Comment
Method used to collect data	Searches of electronic databases, including Ovid-MEDLINE
Literature search procedure	The MEDLINE literature search considered
	English-language articles published between January 1, 2000 and August 2, 2019, using the following keywords: ("thyroid" AND ["radiofrequency ablation" OR "RF ablation" OR "RFA"] AND ["guideline" OR "recommendation" OR "opinion" OR "statement"])
Method used to formulate recommendations	Modified Delphi method