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  1. pdf2018MeShTreeHierarchy.pdf 
    https://www.nlm.nih.gov/mesh/2018/download/2018MeShTreeHierarchy.pdf
    ... 329.937...........................................Hypotrichosis C17.800.329.937.122...........................................Alopecia C17.800.329.937.122.147...........................................Alopecia Areata ...
  2. pdfSNOMED CT July 2017 International Edition - SNOMED International Release notes 
    https://www.nlm.nih.gov/...leaseNotes_Current_en-US_INT_20170731.pdf
    ... 378213010: Irapa type spondyloepimetaphyseal dysplasia 1787720010: Frontal fibrosing alopecia 473039016: Hyperprolinaemia type II 473043017: Hyperprolinaemia, type II ...