1. 1. E Imai, M Horio, and K Nitta et al.Estimation of glomerular filtration rate by the MDRD study equation modified for Japanese patients with chronic kidney disease . 2007 ; 11 : 41 -5 .
2. 2. H Penn, AJ Howie, and EJ Kingdon et al.Scleroderma renal crisis: Patient characteristics and long-term outcomes . 2007 ; 100 : 485 -94 .
3. 3. T Sugimoto, M Soumura, and K Danno et al.Scleroderma renal crisis in a patient with anticentromere antibody-positive limited cutaneous systemic sclerosis . 2006 ; 16 : 309 -11 .