Abstracts.

This section presents abstracts of research papers related to internal medicine, including "Development of a Disease Damage Index in Systemic Sclerosis Using Consensus and Data Driven Methods," by Huq Molla et al., "Survival in Systemic Sclerosis-Related Pulmonary Arterial Hypertension in the Modern Treatment Era," by Stevens Wendy et al. and "Effect of Vitamin D Supplementation on Effusion-Synovitis in Knee Osteoarthritis: A Randomised Controlled Trial," by Wang Xia et al.