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PREVIOUS BONY INFECTION INDICATOR OF TIBIA OR HINDFOOT
PREVIOUS FRACTURE INDICATOR FOR ANKLE REPLACEMENT
PREVIOUS NEGATIVE HIV TEST IN UNITED KINGDOM INDICATOR
PREVIOUS SURGERY TYPE FOR ANKLE JOINT
PREVIOUS SURGERY TYPE FOR SHOULDER REPLACEMENT
PREVIOUS SYMPTOM INDICATOR
PRIMARY CATEGORY OF CARE REQUIRED ON ADMISSION TO NEONATAL CRITICAL CARE
PRIMARY DIAGNOSIS
PRIMARY EXTRANODAL SITE
PRIMARY TUMOUR STATUS
PRINCIPAL DIAGNOSTIC IMAGING TYPE