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The Human Phenotype Ontology (HPO) is downloaded weekly from The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at

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Accession:HP:0001281 term browser browse the term
Definition:A condition characterized by intermittent involuntary contraction of muscles (spasms) related to hypocalcemia or occasionally magnesium deficiency.
Synonyms:exact_synonym: Intermittent involuntary muscle spasm
 xref: MSH:D013746;   SNOMEDCT_US:10629009;   UMLS:C0039621

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the musculoskeletal system 0
        Abnormality of the musculature 0
          Abnormal muscle physiology 0
            Tetany 0
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