Low-Risk ALL Pediatric Clinical Trials Require the WBC Count to Be

Low-risk ALL pediatric clinical trials require the WBC count to be less than:

A) 20 $\times$ 10⁹/L
B) 50 $\times$ 10⁹/L
C) 60 $\times$ 10⁹/L
D) 75 $\times$ 10⁹/L