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Alternatively , anemia could result from accelerated suicidal erythrocyte death or eryptosis , which is characterized by exposure of phosphatidylserine ( PS ) at the erythrocyte surface and by cell shrinkage .
 Disease: anemia; Chemical: phosphatidylserine; Chemical: PS
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: anemia; Chemical: phosphatidylserine; Chemical: PS