Experiment	Measurement	Reference
BaBar	\([15 ^{+9}_{-8}\mbox{ (stat)} \pm 3\mbox{ (syst)}] \times 10^{-6}\)	PRD 89, 112002 (2014)
Average	\(\mathbf{[15 ^{+9}_{-9}\mbox{ (combined)}] \times 10^{-6}}\)