Primary Health Care: Open Access

Publications

• Research Article
  Age-related Differential Item Functioning for the Patient-reported Outcomes Information System (PROMIS^®) Physical Functioning Items
  Author(s): Sylvia H Paz, Karen L Spritzer, Leo S Morales and Ron D HaysSylvia H Paz, Karen L Spritzer, Leo S Morales and Ron D Hays
  
  

  DOI: 10.4172/2167-1079.1000131

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