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Targeted expression to specific tissues or cell lineages is a necessary feature of a gene therapy vector for many clinical applications , such as correction of hemoglobinopathies or thalassemias by transplantation of genetically modified hematopoietic stem cells .
 cell type: genetically modified hematopoietic stem cells
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: genetically modified hematopoietic stem cells 
Answer:
 cell type: genetically modified hematopoietic stem cells