Author 1	Author 2	Author 3	Author 4
Concepts	✓	✓
Design	✓	✓	✓
Definition of intellectual content	✓	✓		✓
Literature search		✓		✓
Clinical studies	✓	✓
Experimental studies
Data acquisition		✓		✓
Data analysis		✓	✓	✓
Statistical analysis		✓
Manuscript preparation	✓	✓	✓	✓
Manuscript editing		✓		✓
Manuscript review	✓		✓	✓
Guarantor	✓