Participant Recruitment:
Telephone communication was attempted with all patients who met the inclusion criteria. Telephone contact information was available within the CHLA hematology section database and the hospital’s Electronic Medical Record system. Messages were left on voice-mail when available and multiple calls were attempted to all existing phone numbers until the patient was reached or it was determined that no current contact information was available. Emails and/or letters were sent to patients for whom telephone communication was not successful.