CLINICAL AND EXPERIMENTAL DERMATOLOGY, cilt.32, sa.2, ss.141-144, 2007 (SCI-Expanded)
Background. Because the Psoriasis Area and Severity Index (PASI) does not consider the severity of nail disease, a scale that assesses the extent of involvement of psoriatic nails is needed. A new grading system, the Nail Psoriasis Severity Index (NAPSI) has been proposed.