"In spite of the growth in available diagnostic technology and studies, expertise in correctly performing assessment skills, obtaining valid data, and interpreting the findings accurately remains fundamental to the provision of the safe, high-quality, patient-centered, and cost-effective practice for which NPs are known. Even once these skills are accomplished, accurate diagnosis remains a difficult aspect of practice. Novice practitioners often spend much energy and time narrowing their differential diagnosis when they have no clear guidance that is driven by the patient or complaint. For this reason, our aim was to develop a guide in the assessment and diagnostic process that is broad in content and suitable for use in varied settings"--