PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 24462831-4 2014 Initial ELISA analysis of circulating BDNF in 30 healthy human volunteers showed that 72 h exposure to high altitude (~11,000 ft, alveolar PO2 = 100 mmHg) results in higher BDNF compared to samples taken at sea level. PO-2 139-142 brain derived neurotrophic factor Homo sapiens 173-177