Tana, Lusianawaty, and Daroham Mutiatikum. “Impact of Smoking and Obesity on Rheumatic Disease in Persons of Productive Age”. Universa Medicina 29, no. 2 (August 26, 2010): 96–103. Accessed July 27, 2021. https://univmed.org/ejurnal/index.php/medicina/article/view/208.