Methadone Hydrochloride Market, by Formulation (Tablet, Solution, and Others), by Application (Opiate Withdrawal, Chronic Pain, and Others), by Route of Administration (Oral and Intravenous), by Distribution Channel (Hospital Pharmacies, Retail Pharmacies, and Online Pharmacies), and by Region (North America, Latin America, Europe, Asia Pacific, Middle East, and Africa) - Size, Share, Outlook, and Opportunity Analysis, 2020 - 2027