PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 2442186-8 1987 Significant negative correlations were found between the levels of both BP-28 and BP-53 and the lecithin to sphingomyelin ratio, suggesting an association between the levels of both proteins and the degree of fetal maturity. Lecithins 96-104 BP53 Homo sapiens 82-87