PAR

• parent in semantic hierarchy [UMLS];

• participating provider;

• passive avoidance reaction;

• percentage abnormal results;

• perennial allergic rhinitis;

• photo-synthetically active radiation;

• Physical Activity Recall [Questionnaire];

• physiological aging rate;

• plain abdominal radiograph;

• platelet aggregation receptor;

• platelet aggregate ratio;

• Policy, Action, and Rational Drug Use [WHO];

• population-attributable risk;

• population-attribute risk calculations;

• postanesthesia recovery;

• postanesthesia [recovery] room;

• posterior wall or aortic root;

• primary angioplasty research;

• Program for Alcohol Recovery;

• proximal alveolar region;

• pseudoautosomal region;

• pulmonary arteriolar resistance