Long-acting opioids and headache.
Robbins Headache Clinic, Northbrook, IL, USA.
Lawrence
L
Robbins
D000701:Analgesics, Opioid / Q000627:therapeutic use*; D000818:Animals; D006261:Headache / Q000188:drug therapy*; D006801:Humans
D000701:Analgesics, Opioid