Fig. 1From: HPOAnnotator: improving large-scale prediction of HPO annotations by low-rank approximation with HPO semantic similarities and multiple PPI networksAn example of the HPO hierarchical tree. All parent-child relationships in HPO represent “is-a” relationships. X-linked inheritance, Abnormality of limbs, Phenotypic variability, and Age of death are examples for sub-ontologies Mode of inheritance, Organ abnormality, Clinical modifier, and Mortality/Aging, respectivelyBack to article page