NO.	Criteria	Yes	No	Unclear
1	Study population clearly described (age/sex)
2	Control group clearly described
3	Sampling method clearly described
4	Sampling method consistent and unbiased
5	Quantitative analysis method or semi-quantitative analysis
6	Blinded image analysis
7	Analysis method representative of whole sample and unbiased
8	Reliability and/or validity of methods described
9	Study limitations mentioned/addressed
10	Statistical level of significance stated

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Hegedus EJ, Cook C, Brennan M, Wyland D, Garrison JC, Driesner D. Vascularity and tendon pathology in the rotator cuff: a review of literature and implications for rehabilitation and surgery. Br J Sports Med 2010; 44:838–47.