Since the second version of the Group for Research and Assessment of Psoriasis and
Psoriatic Arthritis (GRAPPA) treatment recommendations were published in 2015, therapeutic …

Background: The study of psoriatic arthritis is difficult and has lagged behind the study of other
arthropathies in that there are no universally agreed or properly validated case definitions…

The objective of these guidelines is to provide healthcare professionals, including primary
care dental practitioners, with clear guidance on the management of patients on oral …

… Helliwell PS. Therapies for dactylitis in psoriatic arthritis: a systematic review. J Rheumatol …
Sokoll KB, Helliwell PS. Comparison of disability and quality of life in rheumatoid and psoriatic …

Background: Although disease-specific health status measures are available for ankylosing
spondylitis (AS), no instrument exists for assessing quality of life (QoL) in the condition. …

… PS Helliwell1 … , Academic Unit of Musculoskeletal Disease, Chapel Allerton Hospital,
Chapeltown Road, Leeds LS7 4SA, UK; p.helliwell{at}leeds.ac.uk … Helliwell PS …

Background Early intervention and tight control of inflammation optimise outcomes in rheumatoid
arthritis but these approaches have not yet been studied in psoriatic arthritis. We aimed …

Objective To assess currently available tools for measurement of enthesitis and to develop
a new instrument specifically for use in psoriatic arthritis (PsA). Methods Twenty‐eight …

Background Many patients with psoriatic arthritis have an inadequate response to tumor
necrosis factor (TNF) inhibitors. Guselkumab, a specific inhibitor of interleukin-23 (IL-23) via IL-…

… Luke’s Hospital; PS Helliwell MD, PhD, FRCP, Senior Lecturer in Rheumatology. Address
reprint requests to Dr. PS Helliwell, Rheumatology and Rehabilitation Research Unit, …