Experiment	Measurement	Reference
Belle	\([1.34 \pm 0.17\mbox{ (stat)} \pm 0.09\mbox{ (syst)}] \times 10^{-4}\)	Phys. Rev. D 93, 052016 (2016)
Average	\(\mathbf{[1.34 \pm 0.19\mbox{ (combined)}] \times 10^{-4}}\)