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. 2011 Sep 1;7:25. doi: 10.1186/1746-4269-7-25

Table 2.

Duration in Practice

Duration (in years) Frequency Percent
6-15 5 12.5
16-25 9 22.5
26-35 10 25.0
36-45 12 30.0
46-55 4 10.0
Total 40 100.0