Subject
Child; Humans; infant; Pain Measurement; Adult; Anemia; adolescent; Preschool; PedPal Lit; infant; Newborn; United States/epidemiology; Analgesics/therapeutic use; Patient Education; Antisickling Agents/therapeutic use; Hydroxyurea/therapeutic use; Pain/epidemiology/nursing/psychology/therapy; Relaxation Techniques; Sickle Cell/mortality/nursing/psychology/therapy