Experiment	Measurement	Reference
Belle	\([1.16 \pm 0.22\mbox{ (stat)} \pm 0.12\mbox{ (syst)}] \times 10^{-4}\)	Phys. Rev. D 93, 052016 (2016)
Average	\(\mathbf{[1.16 \pm 0.25\mbox{ (combined)}] \times 10^{-4}}\)