Table 1.

Study data collection

Study characteristic	Specific items
Study identifiers	Title, authors, journal, publication year, county of publication, and sponsorship
Study design	Number of animals assigned to each experimental and control group and method of SNHL induction
Animal model characteristics	Animal species, gender, strain, age, method of SNHL induction, and immune status
Intervention characteristics	Source of MSCs, MSC identifiers including plastic adherence, positive/negative markers, differentiation, cell expansion media, passage number, cell dose, method of delivery, timing relative to SNHL induction, and frequency of MSC administration
Outcome measures	Method of assessing hearing outcome and timing of data collection relative to SNHL induction
Other	Long-term outcomes, type of control, MSC side effects (animal survival)