Eren Yuksel, Mehmet. “Cardiopulmonary Examination of the Patients With Covid-19 Should Be Performed With Electronic Sound Amplifying Stethoscope”. Annals of Medical Research 28, no. 2 (May 25, 2021): 00000453. Accessed December 22, 2024. http://annalsmedres.org/index.php/aomr/article/view/364.