6646
One hundred units / kg of recombinant human erythropoietin ( rhEPO ) was given subcutaneously 3 times a week for 3 weeks .
 recombinant human erythropoietin, rhEPO
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 recombinant human erythropoietin, rhEPO