Table 2.

Studies that showed a moderate-high risk of bias in methodological quality, and the reasons for this assessment

Study	Level of risk	Reasons: The following items were not clearly described in the case report:
Yang et al. [35]	High risk of bias	1Lack of diagnostic tests or assessment methods 2Lack of intervention[s] or treatment procedure[s] 3Lack of post-intervention clinical condition 4Unreported adverse events [harms] or unanticipated events
Jang et al. [33]	Moderate risk of bias	1Lack of intervention[s] or treatment procedure[s] 2Lack of post-intervention clinical condition 3Unreported adverse events [harms] or unanticipated events