Experiment	Measurement	Reference
Belle	\([4.8 ^{+1.1}_{-1.0}\mbox{ (stat)} \pm 0.5\mbox{ (syst)}] \times 10^{-5}\)	PRL 90 141802 (2003)
BaBar	\([4.0 \pm 0.7\mbox{ (stat)} \pm 0.3\mbox{ (syst)}] \times 10^{-5}\)	PRD 74 (2006) 031101
Average	\(\mathbf{[4.2 \pm 0.6\mbox{ (combined)}] \times 10^{-5}}\)