Characteristics of patients with systemic sclerosis living in Qatar.

The aim of this study was to determine the demographic, clinical, and immunological characteristics of patients with systemic sclerosis living in Qatar. This retrospective study included 42 patients with systemic sclerosis who attended Rheumatology Clinics at Hamad General Hospital in Doha, Qatar, between January 2000 and December 2014. All patients fulfilled the 1980 American College of Rheumatology (ACR) classification criteria for systemic sclerosis.

Vitamin D status in health care professionals in Qatar.

Objective: To investigate the prevalence of vitamin D deficiency among health care professionals working at Hamad Medical Corporation in Doha, Qatar.

Methods: Between 15th January 2007 and 15th January 2008, 340 healthy volunteers were included in this study. Each subject completed a diary to determine the duration of sunlight exposure, and vitamin D supplements.

Poststreptococcal reactive arthritis and the association with tendonitis, tenosynovitis, and enthesitis.

Aim: To study the clinical presentation of poststreptococcal reactive arthritis (PSRA) and its periarticular manifestation.

Methods: This is a retrospective study. The files of all patients diagnosed with PSRA between January 2004 and November 2007 were reviewed with a predetermined checklist.