Katayama, H, K Ohsawa, and H. Yaoita. “Improvement of Progressive Systemic Sclerosis (PSS) With Estriol Treatment”. Acta Dermato-Venereologica 64, no. 2 (March 1, 1984): 168–171. Accessed October 19, 2024. https://medicaljournalssweden.se/actadv/article/view/7024.