The modified Nail Psoriasis Severity Index: validation of an instrument to assess psoriatic nail involvement in patients with psoriatic arthritis
The Journal of Rheumatology (2007) - Comments
pubmed: 17216680  issn: 0315-162x 

Sarah E Cassell, Jeffry D Bieber, Phoebe Rich, Zuhre N Tutuncu, Susan J Lee, Kenneth C Kalunian, Christopher W Wu, Arthur Kavanaugh