Experiment	Measurement	Reference
Belle	\([1.27 \pm 0.31\mbox{ (stat)} ^{+0.22}_{-0.39}\mbox{ (syst)}] \times 10^{-4}\)	PRL 97, 162002 (2006)
Average	\(\mathbf{[1.27 ^{+0.38}_{-0.50}\mbox{ (combined)}] \times 10^{-4}}\)