RT Journal Article SR Electronic T1 Porphyria Cutanea Tarda Masquerading as Systemic Sclerosis: Two Cases Demonstrating an Important Clinical Observation JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 145 OP 146 DO 10.3899/jrheum.190982 VO 48 IS 1 A1 Tkachenko, Elizabeth A1 Pierson, Joseph C. A1 Vleugels, Ruth Ann YR 2021 UL http://www.jrheum.org/content/48/1/145.abstract AB