A 40-year-old man with schizophrenia has failed adequate trials of olanzapine, risperidone, and paliperidone palmitate long-acting injectable with confirmed adherence for the latter two. He continues to experience command auditory hallucinations and disorganized thinking. His treatment team recommends clozapine. His baseline labs show WBC 7,200/mcL and ANC 4,100/mcL. What must be completed before clozapine can be dispensed?