Global Food Allergen Testing Kits Market By Type (Polymerase Chain Reaction (PCR)-based, Immunoassay-based/ELISA, and Others), By Application (Bakery & Confectionery, Infant Food, Processed Food, Dairy Products & Its Alternatives, Seafood & Meat Products, and Others), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029