| prov:value
| - More preferably the radius of curvature is from about 1, 2, 3, 4, 5, 6, 7, 8, or 9 mm to about 5, 6, 7, 8, or 9 cm, even more preferably the radius of curvature is from about 1, 1.25, 1.5, 1.75, 2 or 2.25 cm to about 3, 3.25, 3.5, 3.75, 4, 4.25, 4.5, or 4.75 cm, and most preferably the radius of curvature is from about 2.5 or 2.6 cm to about 2.7, 2.8, or 2.9 cm.
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