Experiment	Measurement	Reference
Belle	\([3.85 \pm 0.31\mbox{ (stat)} \pm 0.38\mbox{ (syst)}] \times 10^{-4}\)	PRD 77:091101,2008
BaBar	\([3.8 \pm 0.6\mbox{ (stat)} \pm 0.4\mbox{ (syst)} \pm 0.3\mbox{ (correlated syst)}] \times 10^{-4}\)	PRD 73(2006) 112004
Average	\(\mathbf{[3.84 \pm 0.42\mbox{ (combined)}] \times 10^{-4}}\)