FIGURE 2.

Classification tree for seronegativity using current treatment, age, and diagnosis. The first division for discriminating patients is based on current treatment. The second division is based on age >82 years or ≤82 years. The third division for patients aged ≤82 years is based on diagnosis. MoAb, monoclonal antibodies; PIs, proteasome inhibitors; IMIDs, immune modulatory drugs; TKI, tyrosine kinase inhibitors; CIT, chemo‐immunotherapy; BCL2, B‐cell lymphoma 2; JAK2, janus kinase 2; BTK, bruton tyrosine kinase; MM, multiple myeloma; MDS, myelodysplastic syndrome; MPN, myeloproliferative neoplasms; CML, chronic myeloid leukemia; CLL, chronic lymphocytic leukemia; NHL, non‐Hodgkin lymphoma [Color figure can be viewed at wileyonlinelibrary.com]