Philip J. Mease & Philip S. Helliwell 
Atlas of Psoriatic Arthritis [PDF ebook] 

Epidemiology.- Etiology and Pathophysiology.- Clinical Evaluation.- Imaging.- Skin and Psoriasis.- Juvenile Psoriatic Arthritis.- The Management of Psoriatic Arthritis.- Treatment of Psoriasis.

Philip J. Mease, MD, is a clinical professor at the University of Washington School of Medicine in Seattle, where he has also been chief resident and fellow in rheumatology, and is chief of rheumatology clinical research at the Swedish Hospital Medical Center. He is highly involved in clinical trials of new therapies for a number of rheumatic disease conditions, (including rheumatoid arthritis, ankylosing spondylitis, psoriatic arthritis, osteoarthritis, lupus, fibromyalgia and osteoporosis, ) and is a founding organizer of GRAPPA (Group for Research and Assessment of Psoriasis and Psoriatic Arthritis.) Publications include numerous articles and book contributions. Philip Mease also sits on review boards for The Journal of Rheumatology, Arthritis & Rheumatism, and The Annals of the Rheumatic Diseases and has received the Medical Communicator Award of the American College of Rheumatology.
Dr Mease chairs / co-chairs three working groups of OMERACT (Outcome Measures in Rheumatology): psoriatic arthritis, fibromyalgia and single joint assessment. He is also on the medical advisory boards of pharmaceutical and biotechnology companies, the Lupus Foundation, the Psoriasis Foundation, and the Northwest Arthritis & Osteoporosis Institute. With a strong interest in education, he is also a part of the speakers’ bureaus of the Arthritis Foundation, Lupus Foundation, National Psoriasis Foundation, Wyeth Ayerst, Smith Kline Beecham, Genelab Technologies, Proctor & Gamble – to name but a few.
Philip S. Helliwell, BM, BCh, is currently senior lecturer in rheumatology at the University of Leeds, Academic Unit of Musculoskeletal & Rehabilitation Medicine. His interests include chronic pain, disability, and communication. He has written about the Moll and Wright classification criteria for diagnosing Ps A, making the case for retaining at least the two subgroups of peripheral and axial disease and splitting the peripheral disease into oligo-and polyarthritis.