Vincent, Vincent, Sumartini Dewi, and Rachmat Gunadi Wachjudi. 2017. “Correlation Between Serum Procollagen Type 1 N-Terminal Propeptide Level With Modified Rodnan Skin Score In Systemic Sclerosis Patients.”. Indonesian Journal of Rheumatology 9 (2). https://doi.org/10.37275/ijr.v9i2.70.