Experiment	Measurement	Reference
BaBar	\([3.73 \pm 0.17\mbox{ (stat)} \pm 0.27\mbox{ (syst)}] \times 10^{-4}\)	PRD 85, 092017 (2012)
Average	\(\mathbf{[3.73 \pm 0.32\mbox{ (combined)}] \times 10^{-4}}\)