Faecal Extraction System Market Segmentation by Assay (Calprotectin, Albumin, Hemoglobin, Bile Acids, and Others); by Application (Parasitic Infection, Viral Infection, Bacterial Indication, Poor Nutrient Absorption, and Others); and by End-User (Diagnostic Center, Hospitals, Ambulatory Clinics, Research Centers, and Others) – Global Demand Analysis & Opportunity Outlook 2031