Table 3. Risk of bias assessment for the case series and case reports.

JBI: Joanna Briggs Institute.

Author & Year	Study design	Tool used	Selection/Inclusion criteria	Reporting of clinical details	Outcome reporting/Follow-up	Confounding/Validity	Overall Risk of Bias
Tobinick (2011) [10]	Case series	JBI checklist for case series	Partial	Yes	Limited	Unclear	High risk
Tobinick (2020) [11]	Case report	JBI checklist for case reports	N/A	Yes	Yes	Unclear	High risk