Experiment	Measurement	Reference
Belle	\([2.8 \pm 0.3\mbox{ (stat)} \pm 0.3\mbox{ (syst)}] \times 10^{-5}\)	Experiment Note
BaBar	\([2.7 \pm 0.3\mbox{ (stat)} \pm 0.2\mbox{ (syst)}] \times 10^{-5}\)	PRD 76 031101 (2007)
Average	\(\mathbf{[2.7 \pm 0.3\mbox{ (combined)}] \times 10^{-5}}\)