All

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 N02 Health Care Facilities, Manpower, and Services D005159 +
  N02.421 Health Services D006296 +
   N02.421.143 Community Health Services D003153 +
    N02.421.143.827 Preventive Health Services D011314 +
     N02.421.143.827.708 Needle-Exchange Programs D018671 
 N02 Health Care Facilities, Manpower, and Services D005159 +
  N02.421 Health Services D006296 +
   N02.421.726 Preventive Health Services D011314 +
    N02.421.726.708 Needle-Exchange Programs D018671