PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 34269464-8 2021 Ristocetin cofactor assay quantified von Willebrand factor (vWF) activity. Ristocetin 0-10 von Willebrand factor Homo sapiens 37-58 34269464-8 2021 Ristocetin cofactor assay quantified von Willebrand factor (vWF) activity. Ristocetin 0-10 von Willebrand factor Homo sapiens 60-63