New Delhi, July 12: A Delhi-based surgeon who helped monkeys and dogs regrow their diseased internal organs two years ago, now claim to have successfully used that organ regeneration technique in humans for regrowth of abdominal wall and reconstruction of urethra - tube that drains urine from the bladder.The technique is being touted by medical experts as a viable alternative to organ transplantation. ``This is the first time our tissue regeneration technique has been used in humans,'' said B G Matapurkar, senior surgeon at the Lok Nayak Hospital whose work is soon to be published in the World Journal of Surgery. The technique developed by Matapurkar's team could provide a viable alternative to organ transplantation.