Areas of research and clinical approaches to the study of liver abscess

Table 4 Topic clusters and descriptors integrated within each for papers on liver abscess (2001-2015)

Cluster 1 (13 items)	Cluster 2 (8 items)	Cluster 3 (8 items)	Cluster 4 (7 items)	Cluster 5 (6 items)	Cluster 6 (6 items)	Cluster 5 (5 items)	Cluster 6 (5 items)
Antigens, bacterial	Bile duct neoplasms	Cholecystitis	Contrast media	Catheterization	Biopsy, needle	Anti-bacterial agents	Biopsy
Bacterial capsules	Carcinoma, Hepatocellular	Colonoscopy	Cysts	Cholangio-pancreatography	Risk, assessment	Ceftriaxone	Laparoscopy
Bacterial proteins	Catheter ablation	Echinococcosis, hepatic	Diagnosis, differential	Drainage	Severity of illness index	Gram-positive bacterial infections	Liver
Community-acquired infections	Chemoembolization, Therapeutic	Fatal outcome	Hemangioma	Endosonography	Suction	Metronidazole	Liver cirrhosis
Diabetes complications	Cholangiocarcinoma	Intestinal perforation	Image enhancement	Stents	Time factors	Sepsis	Necrosis
Electrophoresis, gel, pulsed field	Focal nodular Hyperplasia	Splenic diseases	Liver diseases	Ultrasonography, Interventional	Treatment outcome	-	-
Klebsiella infections	Hepatectomy	Tomography, X-ray computed	Sensitivity and specificity	-	-	-	-
Klebsiella pneumoniae	Liver neoplasms	Ultrasonography	-	-	-	-	-
Phenotype	-	-	-	-	-	-	-
Polysaccharides, bacterial	-	-	-	-	-	-	-
Serotyping	-	-	-	-	-	-	-
Virulence	-	-	-	-	-	-	-
Virulence factors	-	-	-	-	-	-	-