1 Department of Urology, Sri Sathya Sai Institute of Higher Medical Sciences, Prashantigram, Puttaparthi, Andhra Pradesh, 515134, India. Electronic address: gaurav.s@sssihms.org.in.
2 Department of Urology, Sri Sathya Sai Institute of Higher Medical Sciences, Prashantigram, Puttaparthi, Andhra Pradesh, 515134, India. Electronic address: ashwindoc1@yahoo.com.
3 Department of Urology, Sri Sathya Sai Institute of Higher Medical Sciences, Prashantigram, Puttaparthi, Andhra Pradesh, 515134, India. Electronic address: dineshreddy@gmail.com.
4 Department of Urology, Sri Sathya Sai Institute of Higher Medical Sciences, Prashantigram, Puttaparthi, Andhra Pradesh, 515134, India. Electronic address: ganeshgopalakrishnan@yahoo.com.