"A Biosimilar form of recombinant activated factor VII (AryoSeven) is manufacturing by AryoGen Biopharma and since 2012 is available in the market."
It is my understanding that recombinant products are classed as synthetic thus it is an individual's choice. The NATA ( Network for Advancement of Transfusion Alternatives ) website has an article that might interest you www.nataonline.com/node/18921 If you can't link to it the front page of nataonline.com has it listed.
"Focused Update: Perioperative Management of Jehovah’s Witness Patients in Relation to Their Refusal of Allogeneic Blood Transfusion
Oliver Habler, MD"