Table 2: Assessing the risk of bias: domains and parameters

Domain		Parameters
Selection bias		1. Definition of inclusion criteria
		2. Definition of exclusion criteria
		3. Random sequence generation
		4. Allocation concealment
Performance bias		Adequate blinding
Detection bias		Blinding of outcome assessor
Attrition bias		Reporting of dropouts
Reporting bias		Incomplete outcome reporting
Miscellaneous		1. Elaboration of clinical assessment methods and parameters
		2. Elaboration of radiographic assessment methods and parameters
		3. Adequate follow-up period