Table 2.

Methodology

Methodology of guideline	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