Isiwele, Edoise, Ima-Abasi Bassey, and Eyam S. Eyam. “Is Serum PSA a Predictor of Lower Urinary Tract Symptom Severity in Nigerian Males 40 Years and Above?”. Asian Journal of Research and Reports in Urology 1, no. 1 (September 7, 2018): 1-5. Accessed May 19, 2019. http://www.journalajrru.com/index.php/AJRRU/article/view/25442.