Files in this Data Supplement:

• Appendix Table 1 - Search Strategies
  
  
• Appendix Table 2 - World Health Organization Collaborating Center for Drug Monitoring Criteria
  
  
• Appendix Table 3 - Adverse Events in Case Reports of Hydroxyurea for Sickle Cell Disease
  
  
• Appendix Table 4 - a: Hydroxyurea Toxicity in Randomized, Controlled Trials in Diseases Other than Sickle Cell Disease
  
  b: Description of Patient Populations in Randomized Controlled Trials on Hydroxyurea Treatment in Diseases Other than Sickle Cell Disease
  
  c: Toxicity Results in Randomized Controlled Trials on Hydroxyurea Treatment in Diseases Other than Sickle Cell Disease