PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 30866482-1 2019 This study examined whether methadone (hereinafter referred to as MTD) maintenance treatment (MMT) is correlated with sexual dysfunction (SD) in heroin-dependent men. mmt 94-97 metallothionein 1E Homo sapiens 66-69