Bibliographical noteFunding Information:
Acknowledgements AS is supported by the National Cancer Institute Paul Calabresi Career Development Award (5K12CA132783–10) & The Leukemia Lymphoma Society. SBM is supported by the National Institutes of Health (K23NS105948) & the Leon Levy Foundation. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. The corresponding author had full access to all the data in this study and independently made the decision to submit for publication. No medical writers or editors were involved in the creation of this manuscript. The authors wish to acknowledge the help of the SEER-Medicare staff.