2506
From a consecutive series of 350 cases of adult de novo acute myeloid leukemia ( AML ), we identified 20 cases (6%) with a unique immunophenotype: CD33+, CD56+, CD11a+, CD13lo, CD15lo, CD34+/-, HLA-DR -, CD16 -.
 HLA-DR, CD16
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 HLA-DR, CD16