Experiment	Measurement	Reference
Belle	\([4.72 \pm 0.59\mbox{ (stat)} \pm 0.71\mbox{ (syst)}] \times 10^{-3}\)	PRD (R)70,111103(2004)
Average	\(\mathbf{[4.72 \pm 0.92\mbox{ (combined)}] \times 10^{-3}}\)