In the same Nature journal, another group reported structures of the two other opioid receptors. (sbgrid.org)
Other relatives of other opioid victims held pictures and signs bearing the names of their relatives. (news.wbfo.org)
Since fentanyl is so much more potent than other opioid painkillers, drug traffickers only need to pack their drugs with small amounts of it to provide users a powerful punch. (businessinsider.com)