The use of investigations in a general practice.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D019411:Clinical Laboratory Techniques; D003581:Cytodiagnosis; D004739:England; D005194:Family Practice; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007753:Laboratories / Q000706:statistics & numerical data; D008297:Male; D008875:Middle Aged; D009017:Morbidity; D011446:Prospective Studies; D011859:Radiography; D012737:Sex Factors