Experiment	Measurement	Reference
BaBar	\([-3.8 ^{+2.2}_{-1.8}\mbox{ (stat)} ^{+1.2}_{-1.6}\mbox{ (syst)}] \times 10^{-6}\)	PRD 82, 092006 (2010)
Average	\(\mathbf{[-3.8 ^{+2.5}_{-2.4}\mbox{ (combined)}] \times 10^{-6}}\)