Before revision: History VPG was first introduced in the 1960s by Palti and Berovici , who affixed a light source and photosensitive cell onto a gynecological speculum and recorded vaginal pulse waves.Palti, Y.
After revision: History VPG was first introduced in the 1960s by Palti and Bercovici , who affixed a light source and photosensitive cell onto a gynecological speculum and recorded vaginal pulse waves.Palti, Y.