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http://www.uniprot.org/uniprot/P01588
https://www.ncbi.nlm.nih.gov/entrez/viewer.fcgi?val=X02158
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46508122
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=105694
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1201565
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000202
http://www.pharmgkb.org/drug/PA10072
http://www.rxlist.com/cgi/generic/epoetin.htm
https://www.drugs.com/cdi/epoetin-alfa.html
https://en.wikipedia.org/wiki/Epoetin_alfa