Global Hemoglobin A1c Testing Market By Test Type [Laboratory Testing Devices, Point-of-care Testing Devices and others],By Technology [Ion-Exchange HPLC, Immunoassay, Boronate Affinity Chromatography, Direct Enzymatic Assay and Others]: Market Research Report 2021 Covid 19 Impact Outlook, Regional Analysis, Competitive Landscape, Growth Prospects & Forecast -2026