Experiment	Measurement	Reference
Belle	\([2.2 ^{+0.7}_{-0.5}\mbox{ (stat)} ^{+1.1}_{-0.6}\mbox{ (syst)}] \times 10^{-5}\)	arXiv:1408.6457
Average	\(\mathbf{[2.2 ^{+1.3}_{-0.8}\mbox{ (combined)}] \times 10^{-5}}\)