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 Medical Concepts
  Organisms
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 Alphaproteobacteria
 Anaplasmataceae
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 Afipia
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 Nitrobacter
 Rhodopseudomonas
 Brucellaceae
 Caulobacteraceae
 Holosporaceae
 Hyphomicrobiaceae
 Methylobacteriaceae
 Methylocystaceae
 Phyllobacteriaceae
 Rhodospirillales
 Rhizobiaceae
 Rhodobacteraceae
 Rickettsiaceae
 Sphingomonadaceae

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