Inquiry Before Buying Global Insomnia Treatment Market Size, Share & Trends Analysis Report by Type (Drugs (Antidepressant, Benzodiazepine, Nonbenzodiazepine, Melatonin Receptor Agonist, Orexin Antagonist, and Others), and Devices), and by Sales Channels (Prescription and Over-the-Counter (OTC)), and Forecast 2020-2026