Study	Reason for exclusion
Bach 2000	Abstract only that reported interim results: two year follow‐up data for only 41% of the trial participants. No response from trial author.
Beard 2001	Twelve month follow‐up only.
Callaway 1994	Abstract only with insufficient data for analysis. No response from trial author.
Carter 1999	Only six month follow‐up and only reported on isokinetic testing.
Hantes 2004	Twelve month follow‐up only. Insufficient information available in abstract.
Mologne 1996	Abstract only reporting preliminary results at six months. No response from trial author.
Sato 2005	Less than two year follow‐up; only measured anterior tibial translation during isokinetic concentric contraction exercises.