Efficacy and Safety of Fecal Microbiota Transplantation

Inclusion Criteria: Confirmed diagnosis of any of following diseases: * Irritable Bowel Syndrome * Ulcerative colitis * Crohn's disease * Constipation * Clostridium Difficile Infection * Functional Dyspepsia * Parkinson's Disease * Metabolic Syndrome * Non-Alcoholic Fatty Liver Disease * Autism Spectrum Disorder * Radiation Enteritis * Atopic Dermatitis * Food Allergic * Graft-versus-Host Disease * Obesity * Diabetes mellitus * Multi-Drug Resistant Infection * Hepatic Encephalopathy * Enteric Dysbacteriosis * Multiple Sclerosis * Pseudomembranous Enteritis * Acute Pancreatitis * Chronic Fatigue Syndrome * Acute-on-chronic Liver Failure with HBV Infection * Alcoholic Liver Disease * Anorexia * Decompensated Cirrhosis * Henoch-Schonlein Purpura * Autoimmune Liver Disease * Systemic Lupus Erythematosus * Rheumatoid arthritis * IgG4-Related Disease * Celiac Disease * Protein-losing Enteropathy * Asperger Syndrome * Rheumatoid arthritis * Psoriasis * Ankylosing spondylitis * Immune checkpoint inhibition-related colitis * Autoimmune enteropathy * Drug-induced diarrhea * Suffering from gastrointestinal symptoms such as constipation, diarrheas, abdominal pain, flatulence, etc. * The participants must be able to tolerate the FMT infusion method such as endoscopy, colonoscopy, capsule, nasoduodenal tube insertion, etc. Exclusion Criteria: * Current pregnancy or breast-feeding; * Suffering from other severe diseases, including liver or kidney failure, heart failure, MODS, coma, cerebrovascular accident; * Known contraindication to all FMT infusion method such as nasoduodenal tube insertion, endoscopy, colonoscopy and enema; * Any conditions that may render the efficacy of FMT or at the discretion of the investigators.