"Noninfective enteritis and colitis" . "Sanitation" . "Conditions diagnosed by stool test" . "Manchuria" . "Foodborne illnesses" . "RTTEM" . "Circoviridae" . "Northeast China" . "Pediatrics" . "Regions of China" . "Abdominal pain" . "Geography of Northeast Asia" . "RTT(full)" . "Infectious diseases" . "Diarrhea" . "Northeast Asia" . "Virus families" . "Animal virology" . "Inner Asia" .