Table 6. Showing quality appraisal of case series using the Joanna Briggs Institute (JBI) tool.

Y: yes, N: no

Study Characteristic	Gill et al., 2019 [28]	Maihöfner et al., 2018 [29]	Skaribas et al., 2018 [30]	Schwarm et al., 2019 [31]
Were there clear criteria for inclusion in the case series?	Y	Y	Y	Y
Was the condition measured in a standard, reliable way for all participants included in the case series?	Y	N	Y	Y
Were valid methods used for identification of the condition for all participants included in the case series?	Y	Y	Y	Y
Did the case series have consecutive inclusion of participants?	N	N	N	N
Did the case series have complete inclusion of participants?	N	N	N	N
Was there clear reporting of the demographics of the participants in the study?	N	Y	Y	Y
Was there clear reporting of clinical information of the participants?	Y	Y	Y	Y
Were the outcomes or follow up results of cases clearly reported?	Y	N	Y	Y
Was there clear reporting of the presenting site(s)/clinic(s) demographic information?	N	N	N	Y
Was statistical analysis appropriate?	Y	Unclear	Y	Y