Global Opioid Analgesics Market Assessment, By Product Type [Codeine, Morphine, Oxycodone, Hydrocodone, Methadone, Meperidine, Fentanyl, Hydromorphone, Oxymorphone, Dextromethorphan, Tramadol, Others], By Application [Chronic Pain, Acute Pain], By Route of Administration [Oral, Injectable, Others], By Distribution Channel [Hospital Pharmacy, Retail Pharmacy, Others], By Region, Opportunities and Forecast, 2017-2031F