PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 21600051-0 2011 25-hydroxyvitamin D concentration is inversely associated with serum MMP-9 in a cross-sectional study of African American ESRD patients. 25-hydroxyvitamin D 0-19 matrix metallopeptidase 9 Homo sapiens 69-74