Singhal, Sachin, Dharmesh Chandra Sharma, Sunita Rai, Anita Arya, and Prakriti Gupta. “Seroprevalence and Risk Factors of Syphilis Among Blood Donors”. Journal of College of Medical Sciences-Nepal 17, no. 2 (June 30, 2021): 185–194. Accessed November 27, 2021. https://nepjol.info/index.php/JCMSN/article/view/28134.