Veronica, Lubis NZ. The Relationship of Working Period with the Incidence of Occupational Contact Dermatitis in Cleaning Service Workers at Haji Adam Malik General Hospital Medan. Sumat. Med. J. [Internet]. 2020Apr.17 [cited 2024Nov.24];3(2). Available from: https://talenta.usu.ac.id/smj/article/view/3253