Black Horehound (Ballota nigra Linn) Induces Apoptosis in Prostate Cancer Cells (PC-3) Through Intrinsic Signalling Cascade, Jayaraman, Selvaraj, Rajagopal Ponnulakshmi, Veeraraghavan Vishnupriya, Sivagnanam Poonguzhali, Ravikumar Divya, Suga Sumetha Suga Deiva, James Kavin Mozhi, and Mohan Surapaneni Krishna , Pharmacognosy Journal, September 2020, Volume 12, Issue 6, p.1377-1382, (2020)