PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 31522402-1 2019 The present study aimed to assess the level of metal ions [chromium (Cr), copper (Cu), iron (Fe), manganese (Mn), nickel (Ni), and zinc (Zn)] in the serum of patients with fixed orthodontic appliances. Metals 47-52 general transcription factor IIE subunit 1 Homo sapiens 93-95