Doctor KingpinConducted 471 kidney transplants in two Chennai hospitals in the last six yearsCharges Rs 15-Rs 20 lakh per operation. Is said to be worth Rs 100 crore. Owns three bungalows and three farmhouses in and around the city.Donors, most of them poor, gullible women, were lured by lakhs but paid only a few thousands***CDr. Dread: Ravichandran, the brain behind the racketThe loot: Income tax men raid Ravichandran's Chennai house