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Subjects
- Methadone -- therapeutic use1
- Middle Aged1
- Mortality -- trends1
- Naloxone -- therapeutic use1
- Naltrexone -- therapeutic use1
- Opiate Substitution Treatment1
- Opioid-Related Disorders -- drug therapy1
- Opioid-Related Disorders -- epidemiology1
- Opioid-Related Disorders -- mortality1
- Opioid-Related Disorders -- prevention & control1
- Pennsylvania1
- Practice Patterns, Physicians'1
- Prescription Drug Misuse -- statistics & numerical data1
- Sex Factors1
- Urban Population1