This Doctor Invented a Rs. 50 Device To Give Throat Cancer Patients Their Voice AgainHealthcareBy Tanaya Singh29 Dec 2015 15:30 ISTDr. Vishal Rao, a Bangalore based oncologist, has developed a voice prosthesis that can help throat cancer patients speak after surgery. And unlike the extremely expensive ones available in the market today, this device will cost just Rs. 50.Read More