{"eventGroups":[{"description":"Participants are switched from their current opioid medication (oxycodone or morphine) to methadone. Participants receive oral methadone 2-3 times daily for 4 weeks.","id":"EG000","otherNumAffected":0,"otherNumAtRisk":1,"seriousNumAffected":0,"seriousNumAtRisk":1,"title":"Arm I: Opioid Rotation to Oral Methadone"},{"description":"Participants currently receiving oxycodone are switched to sustained-release (SR) morphine. Participants currently receiving morphine are switched to SR oxycodone. Participants receive either oral SR morphine or oxycodone 2-3 times daily for 4 weeks.","id":"EG001","otherNumAffected":0,"otherNumAtRisk":0,"seriousNumAffected":0,"seriousNumAtRisk":0,"title":"Arm II: Opioid Rotation to Another Long-acting Strong Opioid"}],"frequencyThreshold":"5","timeFrame":"9 Months"}