Global Inflammatory Bowel Disease Treatment Market Size study, by By Type (Crohn's Disease, Ulcerative Colitis), By Drug Class (Corticosteroids, TNF inhibitors, IL inhibitors, Anti-integrin, JAK inhibitors) By Route of Administration (Oral Market, Retail Pharmacy), By Distribution Channel (Hospital Pharmacy, Retail Pharmacy, Online Pharmacy) and Regional Forecasts 2021-2027