Filianty Sipayung, M., Y. . Kusnadi, A. . Shahab, R. . Maila Dewi, I. . Soleh, and F. . Pramudhya Hoesain. “Relapse of Pheochromocytoma With Hipertensive Heart Disease Mildly Reduced Left Ventricle Ejection Fraction”. Journal of World Science, vol. 2, no. 9, Sept. 2023, pp. 1421-8, doi:10.58344/jws.v2i9.427.