Concept Keywords and search terms
First concept (P): oral lesions "Oral Lesions"[Mesh] OR "Mouth Diseases"[Mesh] OR "Oral Pathology"[TW] OR "Oral Epithelial Dysplasia"[TW] OR "Oral Lichen Planus"[TW]
Second concept (I): immunofluorescence "Immunofluorescence"[Mesh] OR "Direct Immunofluorescence"[TW] OR "Fluorescent Antibody Technique"[TW]
Third concept (R): conventional diagnostic methods "Biopsy"[Mesh] OR "Histopathology"[TW] OR "Cytology"[TW] OR "Clinical Examination"[TW]
Fourth concept (D): diagnostic accuracy, sensitivity, specificity, clinical utility "Diagnostic Accuracy"[TW] OR "Sensitivity and Specificity"[TW] OR "Clinical Utility"[TW]
Final search combination ("Oral Lesions"[Mesh] OR "Mouth Diseases"[Mesh] OR "Oral Pathology"[TW] OR "Oral Epithelial Dysplasia"[TW] OR "Oral Lichen Planus"[TW])
AND ("Immunofluorescence"[Mesh] OR "Direct Immunofluorescence"[TW] OR "Fluorescent Antibody Technique"[TW])
AND ("Biopsy"[Mesh] OR "Histopathology"[TW] OR "Cytology"[TW] OR "Clinical Examination"[TW])
AND ("Diagnostic Accuracy"[TW] OR "Sensitivity and Specificity"[TW] OR "Clinical Utility"[TW])

Mesh = Medical Subjects Headings; TW = text word.