In People v. Bransford (1994) 8 Cal.4th 885, the Supreme Court held the amendment of section 23152, subdivision (b) that declared "percent, by weight, of alcohol in a person's blood," meant either "grams of alcohol per 100 milliliters of blood or grams of alcohol per 210 liters of breath" rendered expert testimony on breath to blood partition ratio variability inadmissible. "The Legislature intended the statute to criminalize the act of driving either with the specified blood-alcohol level or with the specified breath-alcohol level." (People v. Bransford, supra, 8 Cal.4th at p. 890.)